New Life for a truck passed its prime

[flattopwill]

Well I can't figure out which cluster wire to tap into. The diagrams I looked at showed more than one speedometer related wire. One from speed sensor, one from the ECM labeled vss, and I think one more.
I think I read somewhere that pre-91 trucks have the drac box in the cluster.

[RedHeartbeat]

Tap into the wire coming from the PCM, try that first.

[flattopwill]

Tap into the wire coming from the PCM, try that first.

Will do. Thanks.

[low91]

Well I can't figure out which cluster wire to tap into. The diagrams I looked at showed more than one speedometer related wire. One from speed sensor, one from the ECM labeled vss, and I think one more.
I think I read somewhere that pre-91 trucks have the drac box in the cluster.

As far as I know its pre-92. My truck(91) didn't have one, but my brothers 93 did. You should have two wires running from the trans. directly to your cluster, lt. grn/blk and a ppl/wht. I got no idea how to hook it up though, I swapped to a 95+ interor long ago, much simpler wiring. I've got a 91 wiring service manual if you need to know what wire runs where.