I just finished m Hot Cam install and everything runs right, excpet for the fans will not turn on, and I can't make them turn on. I checked the fuse and the relay, and they eon't come on automatically. I turned on the A/C and pulled the AIR fuse and they still won't turn on. Any ideas? Is my coolant temp sesnor shot? Or could have both my fans fried out between taking them out and re-installing them??

 

check all of your fan connections again. Unplug and plug back in. Do you have custom programming, cause if it's stock, they don't come till about 220*

 

Maybe you forgot to plug them in after re-installing them.

 

Well this was done in my garage. The connections were there and we let it go up close to red line and no fans.

Jeff, that might be a good idea to double check all the electrical conncetions to make sure they are functioning. Sometimes you do need to pull them out and put them back in. WHo knows.

 

Nope they're both plugged in and still running the stock program. I let the needle cross into the red then shut it down.

Could BOTH of them gone bad between when I took them out an re-installed them??

 

Jeff & Ryan,


Glad to hear that you got her back together! How about trying a quick manual fan switch to see if you can turn them on yourself? I just installed one this past weekend along with my torque converter and tested it outside the car before mounting. It's very easy to do and would be a good way to check the operation of the fans. PM me if you need help with this and I can walk you through it.


Aaron

 

Find the 10 way connector that is used to do the fan switch mod (should be near the RH hood strut mount). Unplug it. Turn key to ON. On the side of the connector toward the front of the car, jumper a ground to "H" and then "J" (the blue and green wires) to test the fans. Don't ground any other leads.

If the fans don't come on, there is a problem toward the relay panel. If you hear the relay(s) click, but no fan comes on, then the trouble is in the relay or past it. Use this schematic to prove continuity in the wiring and relay operation.

If it all works from there, you might have a pcm problem.

 

Thanks Shoe!

That'll at least help pinpoint the problem.

 

I have also heard that if you dont bleed the system well, it might cause this. You might want to re-bleed it.

Hope that helps,
Claude

 

Hey Shoe,

I was able to ground the jumpers at the connector and the fans clicked right on. If jumped "H" one fan kicked on at low speed, if I jumped "J" they both kicked on at high speed. So does this mean my PCM is fried, or is maybe my coolant temp sensor no good?

 

Well, you made some progress. The only things left are the connections on the back of the pcm and the wires between there and the connector you unplugged. If you can look at the connectors and test the wiring, that would narrow it down further. You could to the same grounding test with the connector on the back of the pcm. Place ground toward the harness and not toward the pcm.

It would also be nice to see with a scanner, if the pcm is saying it is commanding the fans on. I have a feeling it just might be your pcm.

 

Jeff, get that damn thing fixed so we can get it dynoed

 

Great diagram Shoe! Just wondering, could the integrity of the wiring harness been damaged during the install (scraped insulation, bad pin tension, damaged connector, etc.). Again, just a thought...

 

Actually....I talked to Waswa on the phone last night, if I can't get things sorted out here soon, he and (possibly) Jason are gonna come up and take a look at it.

 

Hmmmmm, I'll talk to Jason today and see what he's thinking on this. I work up in Cleveland so it wouldn't be that far for me to run over there...... I'll let you know what I find out from Jason.