Piled Higher and Deeper
Join Date: Aug 2006
Location: Rancho Cucamonga, California, USA
After looking at the 81 Interstate diagram, it appears to me that you have not just one, but two speed sensors in your speedo. One is for the turn signal buzzer which should be the Brown/Red at the turn signal buzzer unit (wherever that is). This appears to be the same kind as on the '83, i.e., just a switchpulsed to ground and any potential comesthrough the buzzer unit (probably 12 volt,but this could be noisy from the buzzer, although it shouldn't be since the buzzer probably works when grounded.. don't know). The second speed sensor (for the air control unit) appears to be powered (+12 back to the fuse box Black/Brown tail light circuit) and is probably sending a pulsed 12 volt signal (through P colored wire (pink?)) that could be tapped at a number of places. I'd be interested in the pulse counts in both of these. Just as a suggestion, if and when you do the pulse count, do a number of wheel rotations because it is probably not an integer number. For the '83, it was somewhere between 70 an 71 pulses for 6 complete rotations; I called it 70.5 which after factoring in the circumference of the tire (about 78.5" if I remember), came out to roughly 9350-9400 pulse per mile.
Have a Gold Wing? Look at the
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! even though they closed this one it has the best graphics and is valid.
If a man speaks in the forest and there is no woman to hear him, is he still wrong?
But formerly San Diego, Terra Haute, Aiken, Oak Ridge, Tonopah NV, Pasadena CA, Aiken SC, Richland WA, and now back to Tonopah NV..)