Hi all.

Am finding a bit of poor work and mysterious things in my 1988 Westy
engine bay.

Situation: engine bay wiring harness likely replaced. ECU and fuel
pump relays are both 4 pin Hella 53. Relay diagram shows what may be a
suppressing diode in parallel at relay coil.

The van runs, but because a 4 pin instead of 5 pin relay is used for
ECU, and that there are 2 less wires going to this relay, am concerned
that the ECU may run the risk of voltage surging through it when
engine shut down.

This isn't rocket surgery but my mind is drawing a blank. It appears
that the new harness is wired to incorporate the (I assume) diode on
the ECU relay, but if someone can confirm that is the case, I'd
greatly appreciated it.

Here's an image showing wires to the ECU and FP relays:

https://lh4.googleusercontent.com/-WSBT0EaD1TY/T8QS2Nc_5bI/AAAAAAAAFzM/3jfPMADDoG4/s640/Digifant%2520ECU%2520Relay.jpg

ECU relay:

86: Black. Confirmed  +  from 15.

85: Two brown wires. Confirmed ground to frame.

30: two red wires. Confirmed from B+ One goes to FP relay 30

87: Red/White,  White wires. Confirmed to PS sensor. I assume one wire
goes to ECU as vehicle runs! Don't know about idle stabilization
module.

FP relay

86 Black-White wire: + from 15  ?

85: White w/Red printing (not shown). Ground from ECU ?

30: Red. B+ confirmed

Since the FP works, (cycles on/off key turned to 15, vehicle runs) I
haven't tested these wires.

Thanks for any insights,

Neil.

-- 
Neil n

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