The heater fan switch will run on ever speed except high. What is the problem? a relay if so where is it. Help?

 

you gotta search for this one. from an earlier post IIRC there are two relays to the blower fan. more details are in a post about a month ago

 

This is for the heater fan in the car not the cooling fans? could you point me to the link.

 

couldn't find that post. Autozone component locator says following for '87 5.7L FI Camaro, Blower (high):

Under hood, passenger side, rear side of strut tower, driver side of blower motor, mounted on evaporator core housing assembly

 

Probably not the relay.

Go tot he blower motor; locate a large fat purple wire. Trace it to its end. That will be a small box with a plug with that purple wire, a big fat red one, and a couple of smaller ones in it. That's the relay. Leave it alone for the time being, probably nothing wrong with it. Follow the large red wire. It will run toward the driver's side, just under the lip of the windshield cowl. About right above the pass side valve cover, you will come to a connector of unbelievably stupid design (it uses the PLASTIC of the connector body to maintain contact tension ). Unplug it. If it doesn't crmuble to dust in the process, you will observe that it is burnt to ashes. Replace it with a pair of the BIG FAT HEAVY-DUTY yellow slide terminals, preferably insulated. Not, the regular little weenie slide terminals that are just like the red and blue ones except they're yellow; the BIG FAT HEAVY-DUTY ones.

The relay is probably fine. They hardly ever go bad. The connector burns up though, in EVERY SINGLE CAR, sooner or later (usually sooner). Every GM car I or any members of my family have or have ever had, that was equipped with that connector, it burned up. That's probably 50 cars total so far, to exactly ZERO that have survived.

 

I replaced mine .