Did Volvo use SAME wire harness for multiple motors; extra plugs everywhere???

[USA_boater]

As I'm tackling the heating up issue, I've found multiple wire harnesses that were either capped and secured intentionally, or dangling free (maybe 4-5). I do know my tach is dead so we could start by me asking where at the engine end the tach plugs in???

Otheriwse, are there any un-used OEM wire harnesses to be expected on a four winns horizon 180 4.3GL-C?

 

[alldodge]

About each each of the GL, VP added more sensors. Which one do you have?

 

[USA_boater]

which one? 4.3GL-C Not sure what sensors? I saw a sensor not plugged in on the block which I assume is a knock sensor? I know I have a cooloant temp sensor, oil presser sensor, exhaust temp sensors (pair)...that's I all I know off-hand.

 

[Scott Danforth]

grey wire to the negative terminal on the coil is the tach.

check the big harness connector, sometimes there is corrosion there

 

[USA_boater]

you mean big harness connector where? By the coil or is it downstream somewhere else?

 

[alldodge]

This is the GL-C and D


This is GL-E



If we go back to a GL-A then there are less sensors, but most work off the same alarm wire