Need help with both fans on this 86 Corvette. Neither one comes on even at temps at 232 degrees. Tried the AC on, still no response. Where is the fuse for engine fans? Can't read fuse block on pass side writing, but all checked out ok. Any help would be appreciatted! THX :yesnod:

 

Check if motors are getting juice to them. Might be a connection problem or check that the motors on them aren't bad :steering:

 

There is a fusible link which blew on mine last December. It's a short 4" length of wire going to a plug which then goes on to the fan relay. My 88 has been converted to righthand drive so my locations could be different, the fan relay was bolted to the left fender. Check at the relay to see if you have power. The fusible link was low down probably under the battery on yours.

I wired up a power lead from the battery via an inline fuse to the relay - and still running it that way - it turns out that the fan motor is fine - draws under 12 amps and I haven't blown a fuse so I think my fusible link may have deteriorated from exhaust heat.

Hope that helps.

S'nut

I

 

First check to see if the fans work.

The fan(s) should come on no later than 239 degrees.

Fan Check

1.) Insert a paperclip and ground the 2 "upper right" terminals on the ALDL connector below the driver's dash. It's just above where your right knee would be when driving.

2.) With the paperclip in place, turn the key to the "ON" position. Your fan should come on. If the fan does not come on, check the Fan Relay.

Fan Relay check

1.) Fan relay is located below the front of the brake master cylinder, mounted on the inner wheel well behind the left front wheel. (Black little box)

2.) Disconnect the wiring at the Fan Relay. If it's corroded, dirty, gummed up with junk, ect. clean it out with some Electronic Spray Cleaner, then continue. Remove the Fan Relay and clean those terminals also.

3.) With the paperclip in place and the key in the "ON" position, connect a jump wire between the "two outer most terminals" on the Fan Relay connector.

4.) If the fan(s) comes on, the Fan Relay is bad. Replace it.

If the fan(s) still does not come on, the problem may lie in the fans themselves. Check the wiring to the fans. Check the wiring at the fan relay for damage.

5.)Apply 12volts to each fan dirrectly. If the fans still do not come on. Its the fan motors.

Good Luck
:auto:

Once you get the Fan problem resolved, consider intalling one of these. http://www.madvet.com/shop?frame=3.138.944
It will turn you fans on at 200 degrees. It keeps my 86 between 180 and 202 degrees in traffic at all times. :D

You have 2 fans, so you just simply remove the switch that is on the cylinder head between the #1 and # 3 spark plug. Takes about 5 minutes.

Guys with only 1 fan have a pipe plug in the head between the #1 and #3 spark plug. I had to grind down a 11/32 pipe plug socket to a 8mm size to fit the "square" hole on the plug to remove it.


[Modified by 86PACER, 12:41 AM 2/13/2004]

 

Good info from 86Pacer but I'm not sure he's addressed the fusible link failure.

The paperclip test is a great idea, easy to do. My bet is that the fan won't run.

I'd then go straight to the source - the fan, and give it some power and see if it runs. (take positive and negative extension lead from battery directly to terminals on fan.)

If the fan doesn't run then it's broken - problem solved.

If, like mine, the fan ran with this direct power test, then start working back -

Check the relay with a meter, is it getting power? if not give it power with the extension lead direct from the battery and see if that makes the fan work - if not then check the fusible link.

How I checked the fusible link - I made up a tester by soldering wires to two dressmaking pins. The wire connects to the meter. Now I can test wires for continuity and also power by sticking the pins in.

I started out with the wire wound tightly round the pin but was getting all sorts of readings. Now they are soldered the readings are rock steady - probably good for setting the TPS as well as testing any wire.

S'nut

 

Have my new one waiting for summer.... to install... get hot here in vegas.... :thumbs:

 

Thanks for all your help guys!

 

:thumbs: You will be pleased. Let's you totally relax in traffic. :D