Addicted To Boost Posted March 29, 2009 Report Share Posted March 29, 2009 My primary cooling fan isn't working. I put a paper clip in my diagnostic port, and my secondary fan turns on, but the primary doesn't. The relays are good, I can swap relays between the two fans, and the secondary will work with both relays. They ohmed out good as well. I tried swapping in a fan from a 93 GP with 68k on it today, and that fan doesn't turn on either. I checked voltage at the relays on the passenger fender, and I'm getting 12.7 volts at the terminals for the secondary, and nothing at the terminals for the primary. All underhood fuses are good and the car works fine otherwise. Any ideas guys? Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 29, 2009 Report Share Posted March 29, 2009 there are two wires at the fan plug. got an multi-meter? should be: one is ground, check for continuity one comes from the relay, check for continuity also, is there power at the relay? Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 29, 2009 Author Report Share Posted March 29, 2009 There is no power at the relay for the Primary Fan. I do however have 12.7 volts at the relay for the secondary fan. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 29, 2009 Report Share Posted March 29, 2009 power at the underhood fuse? Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 29, 2009 Author Report Share Posted March 29, 2009 Which fuse is this? Please bare with me, this car didn't come with a manual, and I don't have a service manual for it either. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 29, 2009 Report Share Posted March 29, 2009 There's a 30 amp on the right (pass) side fusebox. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 29, 2009 Report Share Posted March 29, 2009 I bet the wire lead in the relay box is corroded. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 29, 2009 Author Report Share Posted March 29, 2009 There's a 30 amp on the right (pass) side fusebox. Okay, which one is it? I can take a picture if that helps. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 29, 2009 Report Share Posted March 29, 2009 You said it had blown a couple of fuses recently? Check the 10 amp IGN fuse in that fuse box. The 20 amp is a fusible link. Sorry for that confusion. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 29, 2009 Report Share Posted March 29, 2009 I bet the wire lead in the relay box is corroded. I don't know, there wasn't any on my 1992, remember this is Phoenix, AZ. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 29, 2009 Report Share Posted March 29, 2009 I bet the wire lead in the relay box is corroded. I don't know, there wasn't any on my 1992, remember this is Phoenix, AZ. it can still be damaged. maybe overheated from overuse and corroded due to that. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 29, 2009 Author Report Share Posted March 29, 2009 You said it had blown a couple of fuses recently? Check the 10 amp IGN fuse in that fuse box. The 20 amp is a fusible link. Sorry for that confusion. That was the first thing I checked The regular fuses all looked good. I bet the wire lead in the relay box is corroded. I don't know, there wasn't any on my 1992, remember this is Phoenix, AZ. it can still be damaged. maybe overheated from overuse and corroded due to that. Could you explain in a bit more detail what this wire lead in the relay box is? Quote Link to comment Share on other sites More sharing options...
jake91 Posted March 29, 2009 Report Share Posted March 29, 2009 Which fuse is this? Please bare with me, this car didn't come with a manual, and I don't have a service manual for it either. should have grabed that owners manual at the yard today lol Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 29, 2009 Report Share Posted March 29, 2009 You said it had blown a couple of fuses recently? Check the 10 amp IGN fuse in that fuse box. The 20 amp is a fusible link. Sorry for that confusion. That was the first thing I checked The regular fuses all looked good. I bet the wire lead in the relay box is corroded. I don't know, there wasn't any on my 1992, remember this is Phoenix, AZ. it can still be damaged. maybe overheated from overuse and corroded due to that. Could you explain in a bit more detail what this wire lead in the relay box is? if you pop the box out and look at the underside... it is where the wire attacheds to the metal end clip in the fuse box... Quote Link to comment Share on other sites More sharing options...
Venom Posted March 29, 2009 Report Share Posted March 29, 2009 I have this same problem on my 95 where only the secondary fan kicks on. Im actually working on it today, so maybe if I discover something, Ill pass that along to you. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 30, 2009 Author Report Share Posted March 30, 2009 The wire leads look fine, there didn't appear to be any corrosion on them. Anyone have a diagram or manual handy that says what all the fuses and relays are in the passenger side fuse box? Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 30, 2009 Author Report Share Posted March 30, 2009 bump Quote Link to comment Share on other sites More sharing options...
xtremerevolution Posted March 30, 2009 Report Share Posted March 30, 2009 How about the relay? Not sure where it is, it should be somewhere nearby. Check all of those. Can someone chime in as to exactly which one it is? To test, swap the relays for the primary and secondary fan and see if they kick on. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 30, 2009 Author Report Share Posted March 30, 2009 The relays ohmed out fine. I can swap the relays and the secondary still works, but the primary doesn't. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 30, 2009 Report Share Posted March 30, 2009 I have a CS manual, I'll dig it out when I get home later. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 31, 2009 Author Report Share Posted March 31, 2009 Did you find the manual, Manic? Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted March 31, 2009 Report Share Posted March 31, 2009 Sorry Nick, my wife's in the hospital and when my truck broke on 92 GP, I forgot all about it. It is in sitting the garage though so I see it and tonight when I get home, I'll put up the charts for you. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted March 31, 2009 Author Report Share Posted March 31, 2009 Oh okay, no hurry. Quote Link to comment Share on other sites More sharing options...
ManicMechanic Posted April 1, 2009 Report Share Posted April 1, 2009 What's your email Nick? Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted April 2, 2009 Author Report Share Posted April 2, 2009 nickbrackett@msn.com Quote Link to comment Share on other sites More sharing options...
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