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1991 jimmy key ignition accessory position

Crawdad1968

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I need help with color of wires to look for when key is in accessory position, blows the radio fuse instantly any help please.
 
firewall fuse block should have extra ports labled BATT / IGN / and others . these can be used for the tap in ports .

i never use the stuff off the main ignition switch .
 
The accessory position is the same as ignition on for the radio. That fuse does feed on of the extra power taps at the top of the fuse block, but I don't know how many.
I would suggest using a meter to check between the power out side of the fuse space to the tap ports. Then you can diconnect each one to try and find if the culprit is there.
Try looking at this for a little help.

1542563274185858302339.jpg
 
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