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  1. #51
    Member ptowntsi's Avatar
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    did a test.

    turned jeep on, fan turned on at the line before teh 210 must be 205 at that point. Jumpered the high speed relay for a couple mins, unjumpered and low speed was off so the switch had shut off, coolant temp was below that line as well. waited a couple mins and the low fan kicked on.
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  2. #52
    Chris Jeep98ZJ's Avatar
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    OK the low speed did eventually kick off but where? By the time it shuts off the truck is way to cool. 210* seems to be the sweet spot. Runs smoother and has more power than at 180*
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  3. #53
    Modfag Saleen4971's Avatar
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    Quote Originally Posted by ptowntsi View Post
    did a test.

    turned jeep on, fan turned on at the line before teh 210 must be 205 at that point. Jumpered the high speed relay for a couple mins, unjumpered and low speed was off so the switch had shut off, coolant temp was below that line as well. waited a couple mins and the low fan kicked on.
    that was so not helpful at all.........
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  4. #54
    Chris Jeep98ZJ's Avatar
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    nope lol we still dont know what temp that switch turns the fan off at
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  5. #55
    Member NoTime's Avatar
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    If you have the digital thermomerter,,, why not just boil some water,,, see what temp the switch closes at,,, then turn off stove and ( Have a beer or two ) and let water cool off and see what temp the switch opens at again
    1998 ZJ 5.9 Platinum - 408 SC Sleeper ( 7.49 / 11.? )
    2012 RAM - Tow Vehicle
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  6. #56
    Forum CONDUCTOR Man Z88Z's Avatar
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    Quote Originally Posted by NoTime View Post
    If you have the digital thermomerter,,, why not just boil some water,,, see what temp the switch closes at,,, then turn off stove and ( Have a beer or two ) and let water cool off and see what temp the switch opens at again
    See now that's the plan FTW - even allows for beer consumption

  7. #57
    Member ptowntsi's Avatar
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    it doesn't "open/close" its resistance decreases to a point that grounds the sensor as it heats up. Don't have a digi thermometer.
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  8. #58
    Modfag Saleen4971's Avatar
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    Quote Originally Posted by ptowntsi View Post
    it doesn't "open/close" its resistance decreases to a point that grounds the sensor as it heats up. Don't have a digi thermometer.
    .......so what your saying is, you were of no help at all?
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  9. #59
    Angry Midget apstang50's Avatar
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    Ok I know you want to fix it the right way but for all the trouble you have already gone throught, you could have bought a $3 rocker switch at crapozone and wired it into the low speed switch in the upper hose so you can turn the fan on when you want it on. And you still have the high speed that will turn on on its own, even if you forget to turn the fan on.
    98 Platimum GC 5.9 Limited Flowmaster, relocated intake temp sensor, clear corners, 35% front tint, 5% sunroof tint, white face gauges, Accel coil, Summit Racing 8MM wires, 100w fog lights w/new housings, Mopar tow hooks, Mopar Performance PCM, Summit Racing drilled/slotted rotors w/ EBC pads, K&N FIPK

    SOLD 90 Mustang LX notchback: cobra intake, 70mm TB and spacer, fender mounted CAI, 1 3/4" long tube headers, 2 1/2" offroad h-pipe, 2 chamber flowmasters, 3.73s, subframe connecters, cobra r glass hood, glass decklid, 5-spd, cobra rims, underdrive pullys, e-fan, Steeda short through shifter


  10. #60
    Chris Jeep98ZJ's Avatar
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    Im not the kind of guy who rigs things. I WILL find a switch that works right. Yes i have a digital thermometer however i wont waste my time figuring out when it shuts off because it doesnt matter. The 200* turn on temp is to cool so the turn off temp is irrelevent
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  11. #61
    Member ptowntsi's Avatar
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    saleen your constant nitpicking everything I comment on is growing really old. Whatever it is you got out for me, get over it.
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  12. #62
    Member ptowntsi's Avatar
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    Ok a little update, spoke with Scott again. So it turns out the original part I've been trying to chase down, the venerable 205* turbo buick switch, is/was a 1 wire the whole time. I have no idea how the gm part 15326386/ AC-Delco part 213-928 got thrown into this. This 213-928 part has the same 2 spade terminal connector but it doesn't seem to function as a 'switch'.

    search continues:

    You need this connector to use the 1 terminal switch Delco p/n PT308, GM p/n 12102621


    Here's an example kit from Hypertech showing a similar switch and an adapter with that connector to mate with the switch. This actually might be plug and play with the 5.9L since the adapter converts to a 2-pin weatherpack type connector: http://tinyurl.com/ygqm55p

    Of course you'd have to run a wire from engine ground to the other terminal in that connector to make it work.

    These are available from Jegs: http://www.jegs.com/p/Hypertech/Hype...48498/10002/-1
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  13. #63
    Chris Jeep98ZJ's Avatar
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    Still WAY to cool. the 5.9 does not like to be run that cool. Im getting less power, lower MPG, and just not running the same. 210* is the PERFECT temp for the 5.9 from what im finding. 200* on 185* off is not a good idea. Maybe for track use or guys with superchargers or something but on a stock motor i wouldnt do it.

    Next 2 switches im going to test are

    87-90 Renix 4.0 switch which i mounted in the radiator.
    99-00 300M switch

    I wont have results for a few days. Both have to be special ordered. I will keep you posted.
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  14. #64
    Member ptowntsi's Avatar
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    Jeep is always complicating things. BMW's have electric fans with a high/low/ac setting, and all they use is ONE sensor in the radiator. it controls both high/low based on the temp. they have 80/88* C and 91/99* C, thats 176/190 and 195/210. (used to have a 325is)
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  15. #65
    yumi meowMix BuckeyeRideR's Avatar
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    Doesn't seem to smart how jeep used 2 different sensors. Say if one of these switches went out would it show up on the VIC, or Check engine?
    Captain Nate

  16. #66
    Chris Jeep98ZJ's Avatar
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    Nope my low speed switch in the upper hose went bad. Only way i knew was i had no fan till my gauge read 220* Never overheated but i thought that was a lil high. I let it idle in my driveway till the fan came on. When it did i unpluged the upper switch and the fan stayed on. That means it's the lower switch turning it on.
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  17. #67
    Chris Jeep98ZJ's Avatar
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    Just a little new info. On ebay i bought a upper hose with a t fitting and switch. Hose was brand new Mopar t fitting and switch were used and advertised as perfect working condition. I tested the switch before installing. It kicks on about 200* and off about 197* Quite a bit off from the factory specs. Anyone able to tell me if this is actually a upper switch or maybe its a lower switch? The lower hose will always read cooler than the upper so it's possible. At idle my jeep will rest a hair below the 210* mark. Looks right about 200* Anyone else sit here with a known working fan switch?
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  18. #68
    Member ptowntsi's Avatar
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    Spoke to Scott again. The switch in the upper/lower hose are teh EXACT same. It is only the temp of the water that varies to turn them on at seemingly different temps by the dash gauge.

    The lower hose reads water coming from the radiator (cooler) so its turn on point is going to appear higher on the dash gauge than the upper one.

    Hope that helps a bit..

    When I had the 195 t-stat I remember it idling about that temp. It would run exactly at straight up, maybe just a smidge to the left of it on the freeway in the summer.
    5.9 Magnum Powered ZJ Limited. The Pinnacle of Perfection.

  19. #69
    Chris Jeep98ZJ's Avatar
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    Yea you know i was kinda thinking thats how they set it up. Wouldnt make sense to make 2 switches. I found a working used switch on ebay. Tested it using the same digital thermometer i have been using all along and it's VERY close to the BeCool switch i listed above. I would say thats the best bet for anyone looking to get as close to factory spec at 1/2 the price. Thanks for the info ptown
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  20. #70
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    Found an aftermarket switch.Manufacturer is 4 Seasons part number 36445
    Manufacturer link http://www.4s.com/Online%20Catalogs-...g/Content.aspx
    It's listed at Advance Auto http://shop.advanceautoparts.com/web..._285350983___#
    $34.99

    Will call my parts guy and cross with the factory number to be sure but it looks like the right connector and is described as a switch not a sensor.

  21. #71
    Administrator Ninergrad's Avatar
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    Well that second one looks awfully close to what we have!
    What is the temp range on that thing???
    -Davit.

    98 ZJ 5.9L Slate
    Click here for MODS

    98 Ram 2500 5.9L 24V Cummins, short bed, Blue
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  22. #72
    Chris Jeep98ZJ's Avatar
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    Deff keep us posted!
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  23. #73
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    Emailed the manufacturer for the specs.

    On their web site looking up the 98 5.9 points to that part number.

    If anyone has a few photos of the original sensor I can compare marking with one at Advance, will also verify its a switch and not a resistor.

    Does anyone have the factory part number ?

  24. #74
    Chris Jeep98ZJ's Avatar
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    The factory switch looks quite different. There is no protruding part on the bottom. Its actually inverted. I have one ill get a few pix tomorrow. It doesnt matter if they look the same as long as they act the same. I also believe i have the factory part # written down. Ill follow up tomorrow AM dont feel like going to the garage now.
    Platinum 5.9 167K when i bought her. 2.25" engine pipes 3" Magnaflow cat, 3" Hooker Aerochamber, 3" tail pipe, Ported kegger, 52MM Throttle Body, 24lb ford injectors, K&N drop in filter, Cast JEEP valve covers, MSD coil and wires, All new 6 piece clear light kit, 255/65/16 General Grabber HTS, 242 conversion, XJ u-joint front axle shafts

    96 Dodge Ram 1500, 5.2, picked up 12/3/13, 191K miles, edelbrock air cleaner, dual catback exhaust, headers, 50MM TB, 26,000 GVW tranny cooler, 4" lift, 35" General Grabber AT2 tires on Mickey Thompson Classic wheels.

  25. #75
    Forum CONDUCTOR Man Z88Z's Avatar
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    Here's a crappy picture of some fugly hoses.

    These were pretty messy, even after I cleaned them up a bit I only found 4 digit numbers. Those may have nothing to do with the PNs.

    Pretty sure the one at the top of this pic is 2347 and the other one is 2257 - again, that may have nothing to do with pns...


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