underhood fan fun

[93euro]

so just a little bit ago i was sitting there talking to a friend with the engine on and realized that the temp had risen to 220 and no fan was on. i went home and shoved the paperclip into the diagnostic thing and only the left one came on. im stupid, so any suggestions?

[birdman]

check the relay, you have to use a paper clip and jump two connectors and if the fan comes on then its the relay, if thats not it my guess would be the temp sensor.

[White93z34]

try to power up the fan independeltly, then check the relays, the CTS might be culpret.

[DiscoStudd]

try to power up the fan independeltly

Or swap the plugs of the 2 fans and do the "paperclip" trick again to see if the other one powers up.

 

The fan motors GM uses are notoriously crappy. The cheap ($40) replacements they sell at the auto parts stores aren't much better...

[1990lumina]

You guys are just lucky your engines get warm enough to turn the fan on

 

IIRC the right side only comes on with the A/C

[Crazy K]

IIRC the right side only comes on with the A/C

 

correct

[Bossman429]

When I messed with the fans on my old (TurboSedans new) TSTE.

I paperclipped the ALDL.

swapped relays from fan to fan

Used to test light on the none working fan to verify it was getting power.

Replaced fan

 

I could have skipped messing with relays by simply testing for power at the fan plug, and working backwards from there.

I think you have to replace the fan motor and fan blade together, at least that was the case for the TSTE. You're lucky though, I spent $120 for one fan. Hopefully a regualar W fan setup is much cheaper.

[ExZion]

Im having the same problem with my 1994 Cutlass Supreme with a 3.1. When sitting in the car the left fan comes on with the a/c but the right one never comes on. Even when the car's temp goes to around 220-230 and the check gauges light come on neither fan kicks on. I was wondering about just jumping the relay so that the right fan turns on at start up? any Problems with doing so??