May be why the air doesn’t work...

[chengny]

The new selector switch came in tonight. Going to get the dash back together and harnesses attached. Brown wire has power from fuse panel, good fuse, and everything powered from the junction box to blower motor. Fingers crossed I can get this **** working.

It's gonna work. If it doesn't, just tell it:

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[Honky Kong jr]

It's gonna work. If it doesn't, just tell it:

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That and give it 24v for its insolence.

 

[chengny]

Hey HKJ, sounds like maybe you graduated from the Frank Rizzo School of Auto Mechanics. Me too - class of 1980:

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[Honky Kong jr]

Hey HKJ, sounds like maybe you graduated from the Frank Rizzo School of Auto Mechanics. Me too - class of 1980:

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That’s right if it doesn’t want to work, it will pay.....:and dearly it will pay.

 

[Snoots]

To keep from blowing fuses, disconnect the fan and hook up your meter to the fan plug. Just measure the voltage at that point. That will allow you to check out the entire circuit including the high speed relay. If you have a filter capacitor on the fan motor, check it and see if that is shorted. Caps don't last forever but you can never tell just by looking at them.
Oops. Check to make sure you have a good ground too.
Coffee...I need COFFEE!
Forget a shop. You can do it. You know you can. We know you can.

 

[84 Shorty]

Ok, here’s the shituation. I still couldn’t get the heat to turn on, even with fan on high. I’m getting power all the way to the pigtail that connects to the blower motor relay, as shown in the pic. I checked the ground by blower motor and it’s good to go. I disconnected the plug that the purple wire runs from the relay to motor and jumped a wire straight from red wire on relay pigtail to motor and it fire up. It has to be in the relay/connector. Am I missing something?

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[gmachinz]

I think your blower motor is drawing too much current on high speed.

 

[84 Shorty]

I think your blower motor is drawing too much current on high speed.

I think your blower motor is drawing too much current on high speed.

I disconnected the purple plug from blower motor to test it. I’m not getting any power from the purple wire. It may be hard to tell from the pigtail picture, but the connector that the purple wire goes it is dangling inside the pigtail connector.

 

[Snoots]

That is one nasty connector. Do you have any others laying around that are in better shape? If possible, change out the entire wire because the corrosion has ingressed from the connector up through the wire. Way to go! Good find! You're on your way!

 

[84 Shorty]

That is one nasty connector. Do you have any others laying around that are in better shape? If possible, change out the entire wire because the corrosion has ingressed from the connector up through the wire. Way to go! Good find! You're on your way!

Ordered a whole new pigtail, it will arrive tomorrow. It was only $10, so I figured what the hell.

 

[Honky Kong jr]

Ordered a whole new pigtail, it will arrive tomorrow. It was only $10, so I figured what the hell.

If that wire is corroded to where you cut it to attach it to the new pigtail, replace the whole wire.

 

[84 Shorty]

If that wire is corroded to where you cut it to attach it to the new pigtail, replace the whole wire.

Will do, I’m running out of things to check if this doesn’t work.

 

[Snoots]

I had the relay turn bad on me even though I took it apart and cleaned the contacts. It just didn't last long. Had to put in a new one. No problems since. I also used that contact goop that they put in light sockets in the relay socket. Unless for cost I don't know why GM didn't do that in the first place.

 

[84 Shorty]

I installed the new pigtail connector to the blower motor relay....and boom heat on all speeds. Thanks for all the help fellas. Hopefully this thread helps some others having problems.

 

[Honky Kong jr]

I installed the new pigtail connector to the blower motor relay....and boom heat on all speeds. Thanks for all the help fellas. Hopefully this thread helps some others having problems.

Awsome and thanks for the update. All to often these threads never get closed properly. Nobody likes a cliff hanger when it comes to electrical fixes.