need info on how to connect TBI wiring to the VSS on a 1986 k20 i am using a wiring harness from fuel ingection conection and not sure what wires on the vss to conect the wires from the haeness to
need info on how to connect TBI wiring to the VSS on a 1986 k20 i am using a wiring harness from fuel ingection conection and not sure what wires on the vss to conect the wires from the haeness to
I'm thinking your 1986 K20 was originally carburetor? I think installing a VSS that is inline with the speedometer cable will work? Check out the VSS products from JTR: http://www.jagsthatrun.com/Pages/Spe...eedometer.html
dave w
Your harness is set up for a VSS at the transmission tailshaft, but I would think that your VSS output is at the gauge cluster, correct?
Assuming that you bought a '7747 based harness, the pin at the ECM would be A10, but you'll have to do a continuity test to see which of the two wires at the VSS connector goes to that. If you have a single wire output from your gauge cluster, that would be the wire to connect it to. I'm guessing that the other wire on their connector is going to ground since I don't see a connector for a DRAC/VSSB in the photos on eBay. If it does have a DRAC/VSSB connector built in, it would be one of the pins there that would be connected to A10 instead.
I don't have any experience with the VSS output from the cluster, but I'm assuming that it will be compatible. If not, you'll have to go with the inline adapter that Dave W referred to. That's provided they're able to get more, I have one on order and they said it will take about a month. I've got about 12 more days to wait, but I'm hoping they come through since I haven't found anyone else who sells them anymore.
1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
1975 280Z, TBI 350, 700R4
1953 M-38A1, TBI Buick 231
1951 Ford Panel, 5.3 with 4L80E
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