No function out of controls

[lyndon]

Hey guys when I try to turn on my ac or heat I get no power to anything. I ran a wire from battery to the blower and it came on. I also replaced the triangular black piece that’s bolted in with two screws(forget what it’s called). Checked fuses and can’t figure out what else to check. Harness is new and I checked the plug coming from there also.. am I missing something to check?

 

[superbon54]

Did you visually check fuses or physically check? Pulled out my hair on an electrical issue one time that ended up being a fuse that *looked* good.

Next step might to be pull the heater controls out and verify 1) you have voltage coming to the switch and 2) you have proper voltage coming out when you turn the fan on. The controls have been known to go bad.

 

[melloelky]

https://maliburacing.com/wiring_diagrams/FourSeasonAirConditioner.jpg

take a look down by the starter,it's fed by that so if one of those fuseable links has gone bad you're gonna be short on power.

 

[pontiacgp]

check the red wire that feeds power to the blower, there is a connector that includes the red wire near the front of the passenger side valve cover that is often the source of the problem

 

[lyndon]

Thanks guys will do and what is this piece that little silver box? When I pulled out the controls that orange piece was broken off also.

 

[pagrunt]

This is the blower relay that controls the fan speed.

 

[lyndon]

Ok thanks gonna replace that next

 

[lyndon]

Well I replaced the relay and checked everything stated except for voltage to the controls and still nothing. Think I’m gonna replace them. This is frustrating