Speedo/odometer sensor repair

It looks like you need to remove all the potting material manually. I would recommend to re-solder new wires all the way from the board if possible. That is most likely the easiest way to ensure a quality repair. Let us know how you progress- I potentially have a somehow similar job coming up on my bbi due to a heat sensitive issue with my speedometer and I read somewhere that this could be caused by aging electrical components in the sensor.

Best, Peter

 

part nr

Ferrari 116987
Alfa Romeo 60575205
Maserati 393650106
Veglia Borletti 680517

 

i.m.h.o.

Just not meant to come apart. That potting glues to the housing and everything else, so even if you removed the crimp, the hard part of the journey is not over. I tried removing a potted transformer in Al housing. Battle to the end, and I would call it a questionable success.

A surgical cutback at the surface could allow enough wire exposure to perform a good repair. I would machine back about half of the nylon boss, then using a Dremel by hand to clear about the potting, remove the insulation, and solder. Yes, I concur a board re-connection would be best, but, "Better is the enemy of good". Do you know which wire went where? I think those sensors have polarity. Then I would go to Skygeek and look for the DOW aircraft silicone product to provide strain relief and sealing.

40 years ago, I was cleaning the motor on my 308, and bumped the wires on the sensor, and they broke the same as yours. That sensor was probably cheap and readily available.... anyway, I just repaired as described and it's been working fine since. I just took the car on a nice 80-mile drive (knock-wood). Lots of police out, so using that gage a lot!