gkrynick22

Hey, I have searched like crazy and couldn't find anything relevant. My Heater blower motor does not seem to be working properly. When I put power to the actual blower motor it kicks on. I have a couple of questions. 1. How do I test the relay located directly below the blower motor? 2. Are there any other relays that control the blower motor? 3. If the blower motor is operating correctly and the relays are working properly what else could be the problem? Thanks in advance for any help!

AGENT 86

Define properly, does it work at all, or intermittent, too slow etc.

Diagnostics for C60 blower are in these 2 links from my 86 FSM, should be useful.

http://members.shaw.ca/dankai/HVAV'S.pdf

http://members.shaw.ca/dankai/HVAC%20Electrical.pdf

gkrynick22

Sorry, got a little ahead of myself. Started taking the car apart while typing the post. I have to teach myself the 1 thing at a time thing. The blower does not seem to work at all. Heat comes out but there are absolutely no variable speeds what so ever. So to sum it up I know the heat itself works, I just have no control over the fan speed. Thanks for the links, I'll check them out.

Joe C

first of all, do you have a FSM? can't remember, and i'm not positive, but there should be a trouble-shooting procedure for the blower motor circuit. i had a similar problem on my 85, and it turned out to be a bad electrical connection behind the heater/AC control panel. a FSM is a must!

gkrynick22

Yeah I have a FSM. I am sitting in my living room right now trying to figure it out. I have never been good at taking info from a book and applying it. I have always been a hands on learner. If anyone knows where in the FSM the blower motor trouble shoot might be I would appreciate a point in the right direction. I haven't found a section like that yet.

leesvet

A/C section of the GM manual..

haynes, chiltons, non existant

gkrynick22

I have the red cover GM manual, not the chilton or haynes. I am giving up for tonight. Tomorrow I am going to replace the blower motor relay (it's cheap enough) and see if that helps. If not, I will get back to the FSM.

livetohunt54

At the hvac unit under the hood on the passengers side check the resitor and make sure that none of the coil is broken you only half to undo two screws and pull it out. good luck

AGENT 86

It's in the electrical link I gave you.

http://members.shaw.ca/dankai/HVAC%20Electrical.pdf

Pages 8A-63-0 thru 8A-63-4

gkrynick22

Thanks, I'll check that out today.

gkrynick22

Thanks Agent 86, I was trying to find it in my 85 FSM so I could take it out to my car with me. My WIFI doesn't reach my garage and my printer is out of ink. I found it though, it is near the end. I also found the problem. After replacing the Blower Motor Relay and checking the Blower Resister I pulled out the A/C unit. I used my new power probe (i love that thing, can't believe I haven't had one until now) and put power to the wires that corresponds with the fan speeds and it worked fine. So i guess i have to replace the unit.

My question of the day is I have a manual A/C unit and I would rather have the Automatic. Can I just swap one for the other or is there too much involved? I will fire up the search feature, but I never have any luck with that.

Thanks to all that helped and thanks Agent 86 again for the links.

Elrick

I had a similar problem in my 86, it turned out to be the blower motor resistor. By the way, just got the new heater core in. Funny thing is the old one looks fine and it's not a gm/delco core. It really sucked getting the new one in there and the 2 pipes in their holes. I now know why the floor is so soaked. Big cracks that I couldn't see from underneath. Oh well, I have to fix all those chewed up wires anyway. Let's see if I can put together everything that you took apart, without any rattles. Fiberglassing the floor pans tomorrow

Lowflyer281

I wish these links still worked