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73-87 Chevy _ GMC Trucks => Suburbans => Topic started by: Redcell on May 31, 2010, 09:50:52 pm

Title: A/C or heater stop blowing.
Post by: Redcell on May 31, 2010, 09:50:52 pm

What would cause this? What should I start checking first. The rear still blows great. 87 chev burb

Title: Re: A/C or heater stop blowing.
Post by: beastie_3 on May 31, 2010, 11:13:23 pm

Fuse, relay, grounds, switch.

Title: Re: A/C or heater stop blowing.
Post by: Redcell on June 01, 2010, 11:14:41 am

Where would I find the relays?

Title: Re: A/C or heater stop blowing.
Post by: beastie_3 on June 01, 2010, 11:46:25 am

Its on the heater box in the engine compartment. Get a mechanic book for your truck. There is a wiring diagram in the Technical section. Trace all the wires and check connections and such.

Title: Re: A/C or heater stop blowing.
Post by: VileZambonie on June 01, 2010, 12:09:49 pm

Always start at the source of the malfunction. In this case go directly to the blower motor and verify you have a good connection. Turn the blower on hi and check for B+ at the connector. Report back

Title: Re: A/C or heater stop blowing.
Post by: Redcell on June 01, 2010, 03:17:59 pm

any  mechanic books you recomend? I have a haynes.

Title: Re: A/C or heater stop blowing.
Post by: VileZambonie on June 01, 2010, 03:59:01 pm

Factory service manual

Title: Re: A/C or heater stop blowing.
Post by: Redcell on June 02, 2010, 07:48:12 am

It was the blower motor. replaced it and it blows really great now. Thanks for the help guys.

Title: Re: A/C or heater stop blowing.
Post by: VileZambonie on June 02, 2010, 04:18:01 pm

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=390198627564&crlp=1_263602_263622&ff4=263602_263622&viewitem=&guid=fa85296a1280a0e2050085f0fe3fe439&rvr_id=&ua=WXI7&itemid=390198627564


and


http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200472917582&crlp=1_263602_263622&ff4=263602_263622&viewitem=&guid=fa85296a1280a0e2050085f0fe3fe439&rvr_id=&ua=WXI7&itemid=200472917582

or

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=390195913158&crlp=1_263602_263622&ff4=263602_263622&viewitem=&guid=fa85296a1280a0e2050085f0fe3fe439&rvr_id=&ua=WXI7&itemid=390195913158