Alright I have a head scratcher. I am working on an 86 camaro with a 305 TPI. When I got the car the front was crunched and since I had the replacement parts I went for it. I now have everything back together and I am trying to get the cooling fans working. From what I found on here this car should only have one cooling fan but it has 2. I am not sure if this was a mod or if it came factory this way. Either way I figured out the passenger side fan with help from here but I am stumped on the drivers side fan.

There are currently 2 relays that control the fans and both are mounted on the radiator support. The passenger side fan is controlled by a temp switch between cylinders 6 and 8. All seems well with this one. The part that has me baffled on the drivers side fan is that when I test the leads to the fan motor it has 4 volts between the terminals. When I unplug the second relay the power goes away and I still have not figured out how to get 12 volts to the fan. Seems like something is shorted but after going through the first wire harness I found nothing to fix this. Also when I check out schematics they do not help because this car should not have 2 fans.

In addition I have a code 33 on the ecm so I am not sure if the 2 are related. Any help in troubleshooting would be greatly appreciated.

 

I wonder if they are RamCharger style dodge dual fans? I build them for a lot of GM applications since they fit a lot of 31x19 radiators very well. Post a pic up of what you're dealing with.

 

[quote=formula1LE;5780851]I wonder if they are RamCharger style dodge dual fans? I build them for a lot of GM applications since they fit a lot of 31x19 radiators very well. Post a pic up of what you're dealing with.

Below is a picture of the fans. There are 2 relays. Both are mounted to the side of the radiator support on the battery side.

 

Those look like the OE fans. The passenger side fan should run off the fan switch between cylinder 6 and 8 and, the other won't turn on until the car gets hot. that's when you should see the voltage at the relay.