Fan relay

[udid]

I have never noticed the A/C condenser fan to run. I see it's wired to the temp sender on the RH manifold. I disconnected it at the top of the condenser and connected it to the battery (chassis 12v) and nothing.

I ordered one and it should be here tomorrow. What I'd like to know is where is the relay for this fan? I have looked high & low from the front of the RV thru the hatch and see nothing. I did replace a relay that sits just forward of the A/C pump on the drivers side firewall. I believe it's the fuel pump relay. Not sure if anything else is wired to it.

Relay replaced: https://www.dropbox.com/s/e78a5103yg...B1%5D.jpg?dl=0


Just finished replacing radiator hoses and bypass hose/T-stat.

The only other place I'll need to re-check is under the dash (fuse panel) near the steering column. I traced the best I could the wiring from the connector but everything appears to head back into the coach.

1994 Southwind Storm 28ft 454 TBI w/4L80E

[Quincy]

Originally Posted by udidwht

I have never noticed the A/C condenser fan to run. I see it's wired to the temp sender on the RH manifold. I disconnected it at the top of the condenser and connected it to the battery (chassis 12v) and nothing.

I ordered one and it should be here tomorrow. What I'd like to know is where is the relay for this fan? I have looked high & low from the front of the RV thru the hatch and see nothing. I did replace a relay that sits just forward of the A/C pump on the drivers side firewall. I believe it's the fuel pump relay. Not sure if anything else is wired to it.

Relay replaced: https://www.dropbox.com/s/e78a5103yg...B1%5D.jpg?dl=0


Just finished replacing radiator hoses and bypass hose/T-stat.

The only other place I'll need to re-check is under the dash (fuse panel) near the steering column. I traced the best I could the wiring from the connector but everything appears to head back into the coach.

1994 Southwind Storm 28ft 454 TBI w/4L80E

I had a 95 Pace Arrow and had to replace the AC relay and finally found it by removing the engine cover and looking across the top of the Chevy motor and under the shroud toward the front of the coach wayyy up under the shroud toward the front of the motor. Now since you said you replaced the fuel pump relay (which in my coach was the same kind of relay that fed the AC) Mine were all together in the same place.

Yours might not be the case. I hope this helps and please let us know.

[udid]

That was the exact spot I found the fuel pump relay. There was and is only 1 relay on that interior cowling wall on mine. The link I posted is a shot of it. At this point I'm leaning that it's under the steering column in or next to the fuse panel.

[Soppy]

To check the fan , remove the wire from the sender on the RH side and ground the wire.
The fan should run. Ignition switch may have to be on.

[udid]

Back in business. Installed the new fan and all is working as should.

The fan does come on when the A/C is turned on. If the A/C is off the fan is off unless the temp sender limit is reached ~220 or so then the fan activates. I wasn't able to get the engine warm enough by just idling but once at normal operating temp I shut the engine off for several minutes (heat soak) then turned the key to 'on' position (engine off). The fan kicked on....Awesome!

Started her up and the fan continued to run (A/C off). Fan will run until coolant drops to a certain point temp wise (RH sender based reading).

[udid]

Update:

After looking more closely at the wiring runs for both the A/C auxiliary fan and the temp sender from the right hand manifold they both appear to be running (wire wise) to the relay that I replaced that is hung on the drivers side engine cowling just forward of the A/C compressor. That is the only relay in the engine compartment that I could find. It appears Chevy fed more than (1) item to it?

Anyone with a similar set up that only has (1) relay in the engine compartment area that feeds into more than just the fuel pump?