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**johnmiller66** · 01-23-2021, 05:48 PM

Any ideas on a problem I have on my 72 GMC. Its a non air truck. The blower motor for my heater won't come on unless I run a ground from the blower motor housing to a ground bolt on the body. When I attach the wire to the ground there is a small spark. The heater then works like it should, but will drain the battery dead if I leave the ground wire hooked up.
Thanks for any replies.

01-23-2021, 05:48 PM	#1
johnmiller66 Active Member Join Date: Mar 2014 Location: Wichita Kansas Posts: 100	Heater blower motor Any ideas on a problem I have on my 72 GMC. Its a non air truck. The blower motor for my heater won't come on unless I run a ground from the blower motor housing to a ground bolt on the body. When I attach the wire to the ground there is a small spark. The heater then works like it should, but will drain the battery dead if I leave the ground wire hooked up. Thanks for any replies. Last edited by johnmiller66; 01-23-2021 at 07:21 PM. Reason: just because