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Dan
Dan, Technician
Category: Buick
Satisfied Customers: 23690
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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On my 2003 buick rendezvous heater control don't work we

Customer Question

On my 2003 buick rendezvous heater control don't work we bought nuther one but don't work , on the wiring one is live all the time ,should power on the anther one to
Submitted: 5 months ago.
Category: Buick
Expert:  david craig replied 5 months ago.

Hi Im David, thanks for visiting the site. you are going to need to be a bit more specific as to your problem. the heater control doesnt work when you are selecting hot or cold?

Customer: replied 5 months ago.
Fan speed don't work, or ac button don't work
Expert:  david craig replied 5 months ago.

blower motor is inop even on the highest setting too?

Customer: replied 5 months ago.
No speed works
Expert:  david craig replied 5 months ago.

ok

Customer: replied 5 months ago.
We bought a new heater controler but don't work ,but we test the fan it work. We test wire we power to on of the wire it's on all the time, but the other wire got no Power
Expert:  david craig replied 5 months ago.

ok heres a print of the blower motor controls, 00lets see what could be causing this

Customer: replied 5 months ago.
Ok on them wiring is should be both set of have power
Expert:  david craig replied 5 months ago.

check the 10 amp mdl fuse 41

Expert:  david craig replied 5 months ago.

check all the fuses on the print

Customer: replied 5 months ago.
It's good like I said we got power to the one go to the middle of control, but other don't got power but on the one in the middle one got power all the time
Expert:  david craig replied 5 months ago.

on the print, where do you have power and where dont you have power? which wires?

Customer: replied 5 months ago.
On the one goes in the middle of control
Expert:  david craig replied 5 months ago.

what wire???? where is it on the print?

Expert:  david craig replied 5 months ago.

if this is too difficult for you to explain, I will opt out and let another tech help.

Customer: replied 5 months ago.
I can't read the print
Expert:  david craig replied 5 months ago.

is it too small, because i sent a large file.

Expert:  david craig replied 5 months ago.

have you checked all 5 fuses on the print?

Customer: replied 5 months ago.
The all good
Expert:  david craig replied 5 months ago.

im going to opt out and let another tech help. I cant help you if you cant give me more specific information... have a nice day.

Expert:  Dan replied 5 months ago.

Hello, my name is***** you have automatic or manual controls? Thanks.

Customer: replied 5 months ago.
Automatic
Expert:  Dan replied 5 months ago.

At control module the brown wire should have voltage with key on, orange should have voltage at all times, and black should have ground. Let me know, thanks.

Customer: replied 5 months ago.
Should we have power to both wire or just one wire
Expert:  Dan replied 5 months ago.

Both. The brown should have voltage with key on and orange should have voltage at all times.

Customer: replied 5 months ago.
Orange wire got power but the brown wire don't
Expert:  Dan replied 5 months ago.

This wire gets power from fuse 26 in center console. Check to see if fuse is blown, if not check to see if fuse has power with key on. Let me know, thanks.

Customer: replied 5 months ago.
All the fuse is good
Expert:  Dan replied 5 months ago.

Does it have power with key on?

Customer: replied 5 months ago.
No but the orange one has power to it all the time
Expert:  Dan replied 5 months ago.

Replace the IGN3 relay and let me know if that helps if you are sure fuse 26 does not have voltage.

Customer: replied 5 months ago.
We already replace the relay
Expert:  Dan replied 5 months ago.

Remove relay and jump pin 87 to pin 30, let me know if that puts voltage on 26.

Customer: replied 5 months ago.
It's got power to all fuse but no power to the brown wire
Expert:  Dan replied 5 months ago.

So fuse 26 does get power with key in on position?

Customer: replied 5 months ago.
Expert:  Dan replied 5 months ago.

Then that would most likely mean brown wire is damaged somewhere or fuse box has failed. Check to see if brown wire leaving fuse box has power with key on, if so run a new wire between fuse box and heater. Let me know if you have questions, thanks.

Customer: replied 5 months ago.
But when someone work on it before the mes up the wiring
Customer: replied 5 months ago.
Ok thanks
Expert:  Dan replied 5 months ago.

No problem, make sure to let me know if you run into questions. You can reply to this answer at any time without additional fees even after leaving rating. Thanks.