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Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
 Posted: Fri Aug 03, 2007 12:43 pm Post subject: Cooling fan problem |
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I know it has been very hot lately, but I seem to be having cooling fan problems making it worse on my 98 GTP. I have the standard DHP fan settings in my PCM, but they are not coming on like they used to. I have seen 210 degrees and only low speed fan on. Is there an easy way to check fans for operation, as in jumping to the motors themselves. My 98 does not have a over ride switch set upfor racing like my 01.
Any ideas?
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2001 Silver GTP coup 11.880@116.17 Fun Driver
1998 SilverMyst GTP sedan 13.716 Sold
2010 Black Camaro Daily Driver
1969 Firebird convertible 455 FUN |
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| seen96 Total posts: 2033
Drag Radials Suck on FWD.1997 Grand Prix GT Joined: 01 Oct 2003 Location: elbows deep in 4t65e Age: 46 |
| Posted: Fri Aug 03, 2007 1:00 pm Post subject: |
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C'mon man, you dont know how to Ign. hot wire your fans??  Just fuckin with ya. I'm guessing, the blue wires are the 12V+. Run a wire from a red 18ga. or so wire (probe for 12V) to the fan wire.
Also, you could just run a wire from your batt. into the car, to a switch, then to fan. Yeah, you'll get a code, but atlest you'll be looking at a SES light instead off 220 temps 
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ZZP stuff...
Heads (started as ZZP stg.3 with some improvements)
Cam (XPZ with a slightly different components for valve movment)
IC (Ford Cobra coolant resv., frt exchr the size of a engine rad. weight consum. rear expans. tank)
"Certified Auto Trans Shop" Transmission sold by ZZP...I have no comment for this peice of...great trans.
Also,
SLP Headers <--FOR SALE
Eaton's Gen.3 M90 |
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| seen96 Total posts: 2033
Drag Radials Suck on FWD.1997 Grand Prix GT Joined: 01 Oct 2003 Location: elbows deep in 4t65e Age: 46 |
| Posted: Fri Aug 03, 2007 1:03 pm Post subject: |
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OK, there's a blue and a grey....Im thinkin those are yor 12V+ to the fan. Hook the batt. wire to those to see if they turn on.  |
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| someone Total posts: 284
Mark2007 Other Car Joined: 02 Feb 2005 Location: Rochester |
| Posted: Fri Aug 03, 2007 2:50 pm Post subject: |
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there is whats known as the 5 dollar fan mod. we did on a lot of the older club cars. it allowed you to manually run the fans on high or low. the only down fall was it had the chance of setting off an ses if the fans were on, and the car was not up to operating temp...
i think it did it to like 6 cars in the club back in the day.
i have to find the directions, but i think all you needed was wire, a double pole, double pole switch, and a diode... it was dirt cheap... |
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| Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
| Posted: Fri Aug 03, 2007 7:01 pm Post subject: |
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| I got gas on the way home today, car hot and the cars fans were not on after shut down like the DHP used to run them for a minute or so after shut down, hmm. |
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| seen96 Total posts: 2033
Drag Radials Suck on FWD.1997 Grand Prix GT Joined: 01 Oct 2003 Location: elbows deep in 4t65e Age: 46 |
| Posted: Sat Aug 04, 2007 12:54 am Post subject: |
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| Quote: | | Also, you could just run a wire from your batt. into the car, to a switch, then to fan. Yeah, you'll get a code, but atlest you'll be looking at a SES light instead off 220 temps |
...and since "Someone" posted pretty much what I already posted........what he posted too..lmao.
I think you fan motors are dying or they connectiuon is getting bad. |
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| Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
| Posted: Sat Aug 04, 2007 2:10 pm Post subject: |
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| I used to have the ZZP fan mod on this car, but removed it to install it in my 01 GTP, darn. Today I checked all wiring I spliced when installing ZZPs kit, they looked good. I checked the relays and fuses, all good. The driver side fan is working, but not the passenger side one. And it will not run the fans at all at key off as the DHP PCM has in the past. Anybody got a GP fan set up for sale? |
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| Larry Total posts: 2201
Larry H.2001 Grand Prix GTP Joined: 01 Oct 2003 Location: Rochester, NY Age: 47 |
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| someone Total posts: 284
Mark2007 Other Car Joined: 02 Feb 2005 Location: Rochester |
| Posted: Sun Aug 05, 2007 2:11 pm Post subject: |
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| seen96 wrote: | | Quote: | | Also, you could just run a wire from your batt. into the car, to a switch, then to fan. Yeah, you'll get a code, but atlest you'll be looking at a SES light instead off 220 temps |
...and since "Someone" posted pretty much what I already posted........what he posted too..lmao.
I think you fan motors are dying or they connectiuon is getting bad. |
lets see, your way: running a hot switched wire that is a high current line...
versus a low current setup that is a ground wire to trigger the fans relays into a high or low mode...
yeah, my way is exactly the same way as you said... |
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| Doug Total posts: 804
Doug McKeown2001 Grand Prix GTP Joined: 19 Mar 2004 Location: Geneseo |
| Posted: Tue Aug 07, 2007 7:53 am Post subject: |
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| I got a set of fans from a 98 GT off Ebay for less then $30 bucks shipped, so I will replace both and go from there, thanks for all the help! |
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| seen96 Total posts: 2033
Drag Radials Suck on FWD.1997 Grand Prix GT Joined: 01 Oct 2003 Location: elbows deep in 4t65e Age: 46 |
| Posted: Tue Aug 07, 2007 9:44 am Post subject: |
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| Quote: | lets see, your way: running a hot switched wire that is a high current line...
versus a low current setup that is a ground wire to trigger the fans relays into a high or low mode...
yeah, my way is exactly the same way as you said... |
right....arrrgh |
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| Mike H Total posts: 4243
Joined: 01 Oct 2003 Location: Roch, NY |
| Posted: Tue Aug 07, 2007 10:35 am Post subject: |
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| someone wrote: | | the only down fall was it had the chance of setting off an ses if the fans were on, and the car was not up to operating temp... |
But it reset itself pretty quickly. No biggie. The light was kinda a reminder to turn the switch off.
| someone wrote: | | i think it did it to like 6 cars in the club back in the day. |
1 of the things I completely forgot to rip off my car before trading it. Did wonders for my car at the track. Made the car far more consistent instead of just slowing from one pass to the next. |
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