Both of these run off systems using electrical pulse from the engine/transmission.
It is common for the ground from the gauges to separate from other grounds and grounded together in the dash and to the engine block.
Check this grounding system.
A wire going to the battery broke off, when it was reconnected the gauges and lights on the gauges start working again, however the speedometer and the tachometer did not operate.
It could just be broken. Or the gadget in you gas tank has been displaced
A bad ignition coil can cause your 1987 Acura tachometer to quit working. A bad tachometer cable or ground wire can also cause it to quit working.
I'm not sure about the speedometer, but if the tach is not working a good bet would be the tach filter. With age, a wire often breaks off on these. Look in one of the service manuals to find location. The speedometer may have a similar sensor, but I'm not certain. Thanks! I will check out the book ASAP. Appreciate your answering.
the speed sensor, trans. sensor , or the speedometer cable
Broken speedometer cable?
it is a defective speed sensor.
Speed sensor bad.
If the grinding sound seems to be coming from the speedometer and grinds faster as your speed increases, the likely cause is the speedometer cable. At least some 1990 Dodge trucks (mine) have electric speedometers Len
I would say the mechanic didn't re-install the tachometer wire ,whereever it goes on this motor,which I don't know. I would say the mechanic didn't re-install the tachometer wire ,whereever it goes on this motor,which I don't know.
a wire could have came loose
There are a few reasons that could cause the speedometer to stop working on your Toyota Camry. If the mileage is still working then the speedometer cable end is damaged. If both the odometer and speedometer do not work then the cable is most likely broken.