[paints4me2]

pete is probably right I had a set of flathead jacks pricey solid core plug wires in my 32 with a 8ba flathead and put a set of stewart warnerelectric speedometer and tach. the tach worked fine but the speedometer was go erratic and could never be able to set it .went around and around with the techs at stewart warner with a list of all sorts of things to In which nothing cured it needle would bounce and not smooth out and if I would stop and just sit there and idel and the odometerevery 30 seconds would increse a tenth of a mile without moving the car. talked to another guage vendor at a show who seem to be up on cures and told him what my problem and he said take those solid core wires out and put silicone type in and he was right and everything was fine .speedometer pulser was picing up a signal fom the wires and telling the speedometer I was moving go figure. more than likely you opener is picing up the signal if your using solid core wires. arent todays modern electronics great......