86 monte ss 454

[Nathan454]

That is a beautiful SS you have. I love that you have the big block in there and still have A/C.

It blows the fuse when you move the lever from off to one of the vent settings or when you turn the blower up past the lowest speeds?

I believe it only does it when I turn the vents on

 

[Nathan454]

Give us some more detail on when it blows the fuse and what causes it.

I believe it's blowing the fuse when I turn the system on by the vent selector

 

[Texas82GP]

Did you check the connector I previously mentioned which is behind or above the passenger valve cover? It has four wires and has failed on several nember's cars.

 

[Nathan454]

Did you check the connector I previously mentioned which is behind or above the passenger valve cover? It has four wires and has failed on several nember's cars.

Haven't checked the four wire connection yet,would a relay or resistor be a possibility?

 

[Nathan454]

Haven't checked the four wire connection yet,would a relay or resistor be a possibility?

When I jump the blower motor with a hot wire to battery everything works perfect,I can't find a hvac wiring diagram on the 86 system that shows the relays and resistor setup

 

[Texas82GP]

The wiring diagram in post #22 in this thread shows the resistor and the relay.

 

[Bar50]

It's on the fiberglass a/c box. The resistor is inside, the relay mounts on it near the blower motor.

 

[Nathan454]

Haven't checked the four wire connection yet,would a relay or resistor be a possibility?

When I jump the blower motor with a hot wire to battery everything works perfect,I can't find a hvac wiring diagram on the 86 system that shows the relays and resistor setup

It's on the fiberglass a/c box. The resistor is inside, the relay mounts on it near the blower motor.

Thank you very much I appreciate your help

 

[565bbchevy]

The resister looks like this and as stated has a 4 wire connector going to it.

 

[Nathan454]

I believe it only does it when I turn the vents on

Ok so I replaced the resistor on the blower box the problem is as soon as I turn the vent selector to the on position the fuse blows can't figure out why?