89 blower problem

[Midnight_Fenrir]

Well, I have an 89 Trofeo with a VIC and have a pretty serious problem. My blower doesn't turn on.

Orriginally, it would work when I turned the car on, but if I shut it off again, it wouldn't start back up for about 5-6 hours. So I swapped out the blower motor, and now it doesn't start at all. Going on the advice of someone else, I replaced the AC programmer, to no effect.

Recently, I pulled out my multimeter and started running some tests, there is power going to the fan, but only 1.62 volts, as apposed to the 14 it's supposed to have.

I really need to get this solved before winter, I don't want to be driving my El Camino through the snow.. Any help would be greatly appriciated.

[Midnight_Fenrir]

Err, nevermind, I just found the problem, my blower control module.

Delco 16061602

[Midnight_Fenrir]

Alright... back to square one...

I pulled a replacement from a scrap yard and installed it, the power read at 14 volts for about 30 seconds, then went down to 1.52 again, it does this everytime I start the car... and the blower never turns on...

[maxwedge]

A bad blower motor or poor grounds can cause this also.

[Midnight_Fenrir]

Originally Posted by maxwedge

A bad blower motor or poor grounds can cause this also.

Well, weather the motor works or not is up in the air, but even a good one won't run on the 1.52 volts that are getting to it...

Are there any specific spots I should check for grounding issues? or do I have to open up alllllll those plastic tubes and tear appart my dash?

[Bill V]

Check your BCM for codes. Sounds like there is another issue...

[Midnight_Fenrir]

Originally Posted by Bill V

Check your BCM for codes. Sounds like there is another issue...

I had run a diagnostic along time ago... there was one code that came up, but I couldn't find anywhere to tell me what it was... GM wouldn't even help me...

I'll run it again and post it here tomorrow...

[Midnight_Fenrir]

Ok, here it is.

There were no ECM codes

But there were 2 B111 codes
B552 - History
C553 - Current

[Bill V]

DTC B111= High side temp sensor circuit problem (check the data)
DTC B552= Keep alive memory error (normal for batt disconnect)
DTC B553= No such code.

I would go after the high side temp sensor ckt. It might be keeping the system from functioning at all.

Hope this helps...

[Midnight_Fenrir]

Originally Posted by Bill V

DTC B553= No such code.

It is C553, not B553

And the B111 seemed to be a division of codes, not a code itself, it wasn't labeled like the other ones... of course, I don't know much about it, just using logic... (but what about this car is logical?)

But, what can I do about a the temp sensor? I have no idea where that is... much less it's function...

[Midnight_Fenrir]

Well, I just pulled the blower motor and hooked it up to my el camino, it started right away, so the motor is good.