91 940 fuel gauge into 89 740t wiring help ( disregard solution found)

Cj1992 · Nov 28, 2014

Hey people just wondering if someone might be able to help shed some light on this subject , I got over the fact of not having a working fuel gauge and sender unit so I went to my local wreckers today (Dapto pick a part) and found a 91 940 so I removed the cluster and sending unit from that car , I'm at the stage now I have the sender unit installed and running the car. But being a 91 cluster its different to mine still a yazaki but I'm thinking of wiring the fuel gauge into a separate box that I have made up out of alloy I just wanted some help with the pins on this gauge I have worked out the reference, ground and battery but I still have the one up the top that says sensor im unsure where to wire this into or if to bridge it out.

jamesinc · Nov 29, 2014

This might help: http://www.volvoclub.org.uk/faq/ElectricalInstrumentClusterInterchangeability.htm#FuelGaugeClock

Cj1992 · Nov 29, 2014

Thanks mate just another question is brown the signal wire and does grey go to ground?

jamesinc · Nov 30, 2014

I'm not sure - definitely use a multimeter, it will tell you which go to ground.

Cj1992 · Nov 30, 2014

i worked out that both the sender wires lead up to the cluster so i soldered the ground to the 60/80 area of my existing circuit on my cluster and the sensor wire to the pickup just below and used the voltage gauge power wire for my constant and that seemed to work but im having an issue with it still not correctly reading i have less than 6 liters in the tank and the low light comes on for 2 seconds then goes off