fishermandude

iTrader: (1)

I am at wits end....and in need of help...Working on 1986 V6 MPFI with the single fan and I just can't figure out the problem. To begin with, when I jump the ALDL (A-B) jumpers the fan does not run. Also, with the key on, A/C on...no fan. The only time the fan will run is when the GR/W lead from fan relay on driver side firewall is jumped to a good ground.

I have looked and looked but I am unable to find a fan switch on the passenger side cylinder head just behind the engine removal bracket. I also am unable to locate a lead or pigtial that would connect the switch.

There was a HAYDEN KIT that I was thinking about purchasing. But, I am concerned about the fan not functioning while KEY ON with the A/C ON?

Guys...Any help would be greatley appreciated. Also, perhaps a service manual guide if one is available

camaronewbie

Alot of the controller kits will work with A/C. I've seen some of the Hayden kits, and for the money, the Flex-a-lite kits are better - better features, better instructions, and most Hayden kits I've seen still require the purchase of a relay, whereas the Flex-a-lite kits comes with everyting (even the wiring and connectors) included. But you really just need it to come on when the car gets hot, regardless of the A/C.

But yes, skip thye factory mumbo jumbo junk and install an aftermarket fan controller and be done. My Flex-a-lite has been working great now for over 4 years with no issues ever.

58mark

iTrader: (3)

stupid question... have you changed the relay?

fishermandude

iTrader: (1)

To be clear..I should not be concerned that the fan will not run while jumping the ALDL.. Or even that the fan will not run with key on, A/C on.

fishermandude

iTrader: (1)

changed the relay earlier this week... hoping that would be the fixer

deadbird

You should but, there may be some other issue like a broken circuit between the ECM and relay.
The fan will not start unless the engine is running the compressor.
There is a plug on the A/C line, passenger side, with a blue and black wire. If you unplug this, the fan should come on with the key on.

There should be a redundant fan switch even though the v6 fan is ECM controlled. Fan switch should be in the head between the exhaust ports, not on the back, iirc.

fishermandude

iTrader: (1)

I unplugged the A/C pressure switch and still no fan....I also pulled the ECM and grounded the Green/White pin D2...fan ON...Passenger side head has a PLUG where I would expect to see the switch where you are descibing one should be. I pulled back some of the shielding and could not find any cut or unused pigtails. Do you know where i can find a pic of the said harness connector... ie how many wires what colors and such.I am seriuosly thinking of going after market for the fan controller but my concern over the A/C fan ON issue has me bothered just a bit.