Did the 14 pin connector..ah geesh..
02-28-2011, 05:53 AM
#17
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02-28-2011, 10:55 AM
#18
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Yes, for all the years I've looked at, it's pins 3 (blue/yellow) and 5 (blue/green).
It can be fun to figure out the correct configuration of that connector if it comes apart and the pins fall out. The connector wiring is not shown in one place in the WSM wiring diagrams, but parts of the connector, which is designated T18, are scattered over a number of sheets. Plus the wire colors can fade quite a bit over the years from exposure to the elements.
Anyway, 87-88 are the same. 89+ has an additional wire (pin 7)
TOP (male pins)
PIN - WIRE COLOR/STRIPE - Function
1 - Blue - alternator exciter
2 - Blue/Black - oil pressure
3 - Blue/Yellow - coolant temp
4 - Blue/White - oil pressure
5 - Blue/Green - coolant temp
6 - Green/Blue - oil level
7 - EMPTY except 89+ Brown/Red - oil pressure
8 - EMPTY
9 - Black - AC compressor clutch coil
10 - Green - intake air temp switch for fans
11 - EMPTY
12 - EMPTY
13 - Brown - intake air temp switch for fans (ground)
14 - Yellow - starter solenoid
The BOTTOM (female pins) differs at:
7 - 89+ Brown/Green
10 - Brown/Blue
Jim's pic shows an 86. The 85/86 connector differs in:
7 - Red/White - auxiliary air valve
10 - EMPTY (in 12 instead)
12 - Green - intake air temp switch for auxiliary fan
13 - Red/Green - intake air temp switch for auxiliary fan
and top and bottom wire colors are the same.
It can be fun to figure out the correct configuration of that connector if it comes apart and the pins fall out. The connector wiring is not shown in one place in the WSM wiring diagrams, but parts of the connector, which is designated T18, are scattered over a number of sheets. Plus the wire colors can fade quite a bit over the years from exposure to the elements.
Anyway, 87-88 are the same. 89+ has an additional wire (pin 7)
TOP (male pins)
PIN - WIRE COLOR/STRIPE - Function
1 - Blue - alternator exciter
2 - Blue/Black - oil pressure
3 - Blue/Yellow - coolant temp
4 - Blue/White - oil pressure
5 - Blue/Green - coolant temp
6 - Green/Blue - oil level
7 - EMPTY except 89+ Brown/Red - oil pressure
8 - EMPTY
9 - Black - AC compressor clutch coil
10 - Green - intake air temp switch for fans
11 - EMPTY
12 - EMPTY
13 - Brown - intake air temp switch for fans (ground)
14 - Yellow - starter solenoid
The BOTTOM (female pins) differs at:
7 - 89+ Brown/Green
10 - Brown/Blue
Jim's pic shows an 86. The 85/86 connector differs in:
7 - Red/White - auxiliary air valve
10 - EMPTY (in 12 instead)
12 - Green - intake air temp switch for auxiliary fan
13 - Red/Green - intake air temp switch for auxiliary fan
and top and bottom wire colors are the same.
I don't think I've ever seen that connector ever broken down into that much schematic detail before! I will be saving that for my project notes and can't wait to open that sucker up again to go through my wires. 
02-28-2011, 11:48 AM
#20
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Stupid Question - Do you have to disconnect the 14 pin when doing a timing belt change on these cars, or does it have to come off since you have to feed the harness through the timing belt?
02-28-2011, 11:56 AM
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02-28-2011, 02:00 PM
#23
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Yes, although on one occasion I saw this harness routed BEHIND the belt and I was able to remove the belt w/o disturbing it. Can't recall exactly how it was routed...must have been behind the center cover somehow. It's a pain to route it the factory way, fishing it around the right side belt cover, up behind the lift point bracket and it can be agonizing to refasten the harness's bracket and the coil ground back onto the lift hook.
