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Old 11-23-2016, 09:26 AM   #2
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
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Re: please help me idenitify these wires

I can't figure out the year of your truck but the vacuum switch on the firewall was probably for the lock up torque converter clutch in the transmission.

The flat 4 pin terminal, I would guess, is for the spark control HEI. Is this a '84? '85?
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