CK5
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1986 GMC K20, aka the old ladies shitbox

The blower motor was not working reliably. I put a jumper wire from the blower motor mounting screw to the firewall when I installed the AC delete housing and the screw was loose this afternoon. Tightening that alone didn't fix it so I used a jumper to the negative battery part and confirmed it was still a ground issue. So I just had to grind off a small amount of paint at the ground connection to the firewalland now it is up and running again.

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