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Old September 10th, 2010, 02:56 AM   #1 (permalink)
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Heater/Blower Motor Relay Assembly

Can someone tell me where the blower motor relay is located at?I'm having a problem with the high on my blower. The setting for low and med work but i get nothing went switched to high!


Parts #TR15885

Thanks in Advance
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Old September 10th, 2010, 05:05 AM   #2 (permalink)
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If this is for your 72 Cutlass, the relay will be over the brake booster.
There should be a thick wire going to the junction block with an inline fuse holder - check those before replacing the relay. If there are splices in the wiring, they better be in good shape and be soldered. If the fuse holder was bypassed, replace it.

With engine off, key in RUN, switch from med-high to high and you should hear a click from the relay.

See what you get...
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Old September 10th, 2010, 08:27 AM   #3 (permalink)
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welcome to CO.
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Old September 21st, 2010, 04:00 AM   #4 (permalink)
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Quote:
Originally Posted by Lady72nRob71 View Post
If this is for your 72 Cutlass, the relay will be over the brake booster.
There should be a thick wire going to the junction block with an inline fuse holder - check those before replacing the relay. If there are splices in the wiring, they better be in good shape and be soldered. If the fuse holder was bypassed, replace it.

With engine off, key in RUN, switch from med-high to high and you should hear a click from the relay.

See what you get...
Thanks Lady72nRob71 I have checked the relay as you mention above and hear the click when moving from med to high on the heater switch!Doe this mean the relay is bad or good?Still nothing on high also the wires look non-raped and i don't see any inline fuse at all when i traced the wire back!
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Old September 21st, 2010, 04:26 AM   #5 (permalink)
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It was the high blower speed inline fuse when I had the same problem.
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Old September 21st, 2010, 05:15 AM   #6 (permalink)
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Originally Posted by bluevista View Post
it was the high blower speed inline fuse when i had the same problem.
x 2
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Old September 21st, 2010, 05:26 AM   #7 (permalink)
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The coil of the relay is good, as well as the dash switch.
There should be a thick wire going from the blower relay to the horn relay-junction block. The inline fuseholder should be there (unless somone removed it.)

Either that fuse is bad, the holder bad, the wiring open, or the blower relay contacts are bad.
Take a look again for the fuseholder - hope it is still there...
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1972 Cutlass Supreme Convertible- (442 clone) -"Lady" (My mistress...)
http://www.flickr.com/photos/robsalbum/sets/
Lady's interior makeover Rally Pac stuff
Front end job Underhood resto
1986 Cutlass Supreme Coupe - "Pristine"
1978 Ford Pinto (Old Faithful) a.k.a. "the Tramp" - in the family since new.
1997 Cadillac STS
1999 Harley-Davidson Sportster - "the Freedom Machine"
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Old September 23rd, 2010, 02:22 AM   #8 (permalink)
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Quote:
Originally Posted by Lady72nRob71 View Post
The coil of the relay is good, as well as the dash switch.
There should be a thick wire going from the blower relay to the horn relay-junction block. The inline fuseholder should be there (unless somone removed it.)

Either that fuse is bad, the holder bad, the wiring open, or the blower relay contacts are bad.
Take a look again for the fuseholder - hope it is still there...

That did the trick guys thanks.....but now setting mid high i get nothing every other setting works.I even replaced the relay!This is really starting to get on my nerves!
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Old September 23rd, 2010, 02:56 AM   #9 (permalink)
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That did the trick guys thanks.....but now setting mid high i get nothing every other setting works.I even replaced the relay!This is really starting to get on my nerves!

You didn't loose any of the smoke out of the switch or relay did you?
The resident Classic Oldsmobile electrical experts say that once that happens they're shot.

Fuses are about as deep as I go.
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Old September 23rd, 2010, 03:19 AM   #10 (permalink)
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Quote:
Originally Posted by Lady72nRob71 View Post
The coil of the relay is good, as well as the dash switch.
There should be a thick wire going from the blower relay to the horn relay-junction block. The inline fuseholder should be there (unless somone removed it.)

Either that fuse is bad, the holder bad, the wiring open, or the blower relay contacts are bad.
Take a look again for the fuseholder - hope it is still there...
Quote:
Originally Posted by Bluevista View Post

You didn't loose any of the smoke out of the switch or relay did you?
The resident Classic Oldsmobile electrical experts say that once that happens they're shot.

Nope not a spark! Since you mentioned smoke I think I'll drink a beer and have a smoke on this one!

Fuses are about as deep as I go.
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Old September 23rd, 2010, 05:39 AM   #11 (permalink)
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Quote:
Originally Posted by Boh2k View Post
That did the trick guys thanks.....but now setting mid high i get nothing every other setting works.I even replaced the relay!This is really starting to get on my nerves!
Time to pull out and check the blower resistor, in the eng comptmt on the side of the evaporator case. Should have about 4 wires plugged into it. Sounds like the med-high coil may be open. It will be obvious if so.
It is a little tricky to get to but possible.
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1972 Cutlass Supreme Convertible- (442 clone) -"Lady" (My mistress...)
http://www.flickr.com/photos/robsalbum/sets/
Lady's interior makeover Rally Pac stuff
Front end job Underhood resto
1986 Cutlass Supreme Coupe - "Pristine"
1978 Ford Pinto (Old Faithful) a.k.a. "the Tramp" - in the family since new.
1997 Cadillac STS
1999 Harley-Davidson Sportster - "the Freedom Machine"
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Old September 23rd, 2010, 05:39 AM
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