black box on outer firewall with prons


Asked by Mar 02, 2016 at 02:07 AM about the 1971 Chevrolet C10

Question type: Maintenance & Repair

on the right side of my outer firewall has two small  plastic boxes one white
and one black with prons going different directions, I held down my key to light
testing my starter, and it started smoking ? and I have no idea what it is a
fuse? the one on the left it plugs into 3 separate
wire harnesses that are side by side....? what is it???

1 Answer


it is a relay.....but for what?

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