cooling fan won't come on at all

[stealth908]

water temps got up to 220 while idling in the driveway. my fan won't come on. even with the a/c on.

the resistor mounted on the fan is broken, but it's always been like that and the fan still came on at about 195.

there is no power at all to the three wire connector or at the fan itself.

so, i was jacking around with the relays and now the a/c compressor won't cycle when i turn the a/c on. the compressor just stays going all the time. wtf?

i am suspecting the high or low speed fan relay, but is there anywhere else i can look for problems? i heard that i shouldn't bother with the big delay relay on the drivers fender. just the two smaller (high, low speed) ones on the fender. i read up on several post pertaining to this problem, but none of those threads closely related to my problem.

please help.
travis.

 

[sam87]

pwr to relays?

Sounds like bad relay(s). If max a/c is working, I believe the fan should come on at high speed if the high speed relay is working (w/o computer input). Check for power into the relays. If you have power in, then relays are bad.

 

[stealth908]

there's power there.

on the high speed fan relay, there's 14v on one wire when the a/c comp. is on. 14v on two of the wires when the a/c comp. kicks off. maybe, i should check the grounds going to the relay.

anything else?

oh yeah, i have bypassed the resistor to make it send 13-14v to the fan if it ever turns on.

 

[wiked87gn]

if you need a new fan i got one for $ 50.00 plus shipping, this one is the stocker and it works perfectly, btw i am in california.

 

[stealth908]

no thanks, my fan works when hot wired to the battery.

should i be getting and voltage from the green/yellow wire on the high speed relay? i get 6-7v. the red and brown wires get the 14v i talked about. that is correct for sure. but that green/yellow wire should be a ground, but i don't know how it works, because it's hooked to the temp sensor for the fan. i checked it cold and i don't believe i got any voltage.

i followed a fan circuit trouble shooting guide and it said do this, and this, and this. if this happens then the relays are bad. which is the outcome i got. the problem is, i have to order the relays. plus, i don't want to spend the money if i don't have to. get me? can i have the relays tested?

 

[NM Tom]

My fan did not work high or low, and it was the resistor. I took the resistor out and wired both leads to the high terminal and all is well. No low speed fan, but it comes on as directed by the chip high speed only.

 

[stealth908]

how's the weather in albq.?

how's the weather up ther? it rained all weekend here. but i made the best of it.

i have already bypassed the resistor.

the relays will be in tomorrow. hope it works.

anything else to try?

 

[NM Tom]

It's starting to dry out. The rain is good...but not being able to take the car out is BAD! Hope the relays take care of it.

 

[stealth908]

i hope they work too. i'm still pokin' around in there though until i get them installed.

 

[GNSCOTT]

The low and high speed relays are the small ones on the drivers side fenderwell area.

They are activated by grounding the green or green with yellow stripe smaller wires on the relay connector, through either the chip or the A/C switches or the high temp. fan switch in the intake manifold.

As a test you can provide the ground with a wire to the ground of the battery attached to a sharp probe or a needle to poke through the insulation of the wire and make contact.

Relay should click at that point and this is a key on test in the run position.

If it clicks a bit and doesn't turn the fan on tap on top of the small relays and see if that makes it work.

If so the relay contacts are shot and the new relay should work as a fix.

Leave all the connectors on the relays for the test.