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Old 07-17-2017, 03:04 PM   #4
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,389
Re: What is this wire?

Down on the right side of the transmission are the pressure ports. Some of the later trucks had a spark control system that would only allow vacuum to the distributor in 3rd gear. (emissions crap) The green may may go to that switch OR it could be routed inadvertantly to the right side when it should be on the left side to the temp sending unit
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