Build Live in Texas, drive a pickup: HDJ79 single cab build

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Next, we tried to find the 4 x 4 actuation switch. This is an R151 transmission harness. It is meant to work with a split case and an electrically switched, vacuum actuated BF1a split case. I grabbed a reverse light switch off of an H55 I had and plugged it into the first plug, thinking that grounding out that switch would activate the 4 x 4 light on the cluster.

It did not.

Grounding out the second plug activated some relay in the fuse panel somewhere that we could not directly identify.

I am running an HF1A T case with a full manual shifter. Any ideas on how to make the dash light light up?

Confusingly, the odometer and fuel gauges no longer activate. I have headlights, turn signals, hazard, and ammeter. The clock works on the instrument panel harness. The sub tank switch lights up on the dash and I can hear the solenoids act but the fuel gauges do not move.

We took the dash apart and confirmed that all three plugs were firmly seated in the cluster. I don’t know what I’m missing here.

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