factory tach wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

trap4x4 · 10-31-2004, 05:54 PM

Hi folks....new to the board.Working on getting a '75 sierra 25 4x4 working after sitting in a field for the last 20+ years. Need a wiring diagram or pictures of the factory tach wiring in the engine bay. A pic of the fuse box would help also. Specific question is...does the brown wire run from underdash thru firewall to a "selinoid" on the firewall in the engine bay,to spliter plug and then to the HEI coil????Thanks again.

10-31-2004, 05:54 PM	#1
trap4x4 Registered User Join Date: Oct 2004 Posts: 1	factory tach wiring Hi folks....new to the board.Working on getting a '75 sierra 25 4x4 working after sitting in a field for the last 20+ years. Need a wiring diagram or pictures of the factory tach wiring in the engine bay. A pic of the fuse box would help also. Specific question is...does the brown wire run from underdash thru firewall to a "selinoid" on the firewall in the engine bay,to spliter plug and then to the HEI coil????Thanks again.



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