1988 740 Cluster Wiring diagram?

dex

does anyone have an 1988 740 cluster wiring diagram?

my gauge cluster has been wired so horribly that I have no idea where to start. the oil pressure gauge had three wires connected to it. the volt meter has two wires connected to what looks like the speedo. fuel gauge dead and wires hanging to a lightbulb

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Major Ledfoot

Is there any number stamped onto the top or bottom of the cluster in black ink - if so, what is it?

What instruments are fitted to the cluster? (Big speedo, big tacho, and big clock are common, but what else?)

VDO or Yakazi?

Is the car LH 2.2 or 2.4? (The cluster is different in each).

BTW the arrangement with the wires, like in your picture, is quite normal.

dex

Major Ledfoot

lh 2.2

believe its a vdo

here are some more photos

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Major Ledfoot

Okay, so.... p/n 1363835. A VDO.

These from an 87, Green Book TP31058/1, which is in the Technical Library. AFAIK, the 88 LH2.2 should be the same.

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JFYI detailed schematic diagrams of the clusters aren't in the wiring handbooks.

dex

Major Ledfoot thank you!

out of curiosity have you worked with this clusters fuel gauge at all?

Major Ledfoot

dex I haven't had dramas with the fuel gauge itself, however the tank sender setup will change depending if it's a wagon or sedan, and if the sedan has the second fuel tank.

Grounding terminal B1 at the cluster should show full scale deflection (full tank). If it doesn't, there's a problem with the gauge. If it does, try grounding the sender wire at the fuel level sender itself and you should get the same result. If not, there's a problem in the wiring harness or a connector.