I've got a short in one of the wiring harnesses that runs my heater. I want to just hard wire it so it's always on since winter is quickly approching. What voltage is the heater expecting? I've only got a purple wire and a black wire going into the heater motor. I assume that the purple one it hot. will just pluging in 12V fry it?

------------------
...Keep honking, I'm reloading...

-'79 Malibu Classic
-'86 T/A 350
-'99 S10 LS
-Sig sauer P226 40 caliber
-R.I.P. 79 Monte

 

What exactly is wrong with it? Is it that it only works at certain speeds, or what? Reason I ask is because you may have a fried resistor - or - if nothing works - def, vent, a/c, etc., could be that the switch on your a/c head is bad and not sending a signal to the fan. I'd look into it a little more, rather than just going for the throat and hardwire the fan...

KAM

 

well.. it worked normally when I got the car. Then the fan became intermittent. I had some limited success getting it going again by wiggling the brown wire going from the little control panel to what looked like the harness of vacuum lines. (this wire had a snap connector on it.) Then it quit altogether. I thought the motor had finally burned out, and after tearing apart my dash looking for the short to verify dead motor or not, I got frustrated and kicked the tranny hump. the motor then started again, but when I pushed the control pannel back in place, it cut out again. I've tryed wiggling every harness, connector and relay I can see, but no luck.

------------------
...Keep honking, I'm reloading...

-'79 Malibu Classic
-'86 T/A 350
-'99 S10 LS
-Sig sauer P226 40 caliber
-R.I.P. 79 Monte

 

Anyone?
I need heat!

------------------
...Keep honking, I'm reloading...

-'79 Malibu Classic
-'86 T/A 350
-'99 S10 LS
-Sig sauer P226 40 caliber
-R.I.P. 79 Monte

 

Hey J - sorry I didn't keep up with this post... Anything's possible, and this probably isn't a whole lot of help, but I would still check your switches on the a/c head. When you do get it to work at all, do you have all the fan speeds or just one? You say there seems to be a short in a brown wire in there, and I can't recall which one that is, but if so, is it possible to splice a new wire in, or are you not sure where the short really is?

KAM

 

Sounds just like a blower motor on it's way out. I just got a new one for $17 and it fixed the same sort of problem.

 

Yes, the blower motor simply needs 12 volts to run at full speed. But you see how thick the wire is...it takes a lot of current. If you plan to hot-wire it, use thick wire protected by a fuse. If you can hook up a relay, that would be even safer.