Hi,
I am willing to learn but i am not very good with electrical elements of vehicles and have a few things i would like / need to get sorted. If anyone in the Southwest that would be willing to assist (i can travel) and help me learn whilst doing it?
The issues are on a Mk2 20v converted car which runs and drives fine but i want to get the gauges working correctly. The only gauge that currently reads is the temp gauge.
I would like to have the speedo, tacho and fuel gauge all working and then if possible the oil temp in the MFA.
The clocks are 160mph 16 gti clocks as this was the original spec, there is a fuel cell with a float switch that i think requires a resistor, i have some other gadgets that came with the car that relate to the speedo / Tacho i believe (i also have a Tacho converter from a previous car). I am not sure what would be required for the oil temp.
Kind Regards
Michael
Michael, the tacho is the easiest one to start with. The Mk2 clocks want the signal from coil negative, and a 20v on coil packs hasn't got one, so you need the tach output pin from the engine ECU or that converter you have. Check which ECU it is running and look up its pinout for the rev counter wire. The speedo depends on the gearbox. If it is still a cable box the cable just needs to reach, but a later box with an electronic sender needs a pulse to cable converter or electronic clocks. On the fuel cell, a simple float switch will only ever give you a low fuel warning and not a proper gauge reading. For the MFA oil temp you need the correct sender, normally in the oil filter housing, with its wire run back to the clocks.
Michael, the tacho is the easiest one to start with. The Mk2 clocks want the signal from coil negative, and a 20v on coil packs hasn't got one, so you need the tach output pin from the engine ECU or that converter you have. Check which ECU it is running and look up its pinout for the rev counter wire. The speedo depends on the gearbox. If it is still a cable box the cable just needs to reach, but a later box with an electronic sender needs a pulse to cable converter or electronic clocks. On the fuel cell, a simple float switch will only ever give you a low fuel warning and not a proper gauge reading. For the MFA oil temp you need the correct sender, normally in the oil filter housing, with its wire run back to the clocks.
Thank you. With the fuel tank level then how would this be got around to be able to get a reading on the gauge?
The gauge needs a proper resistive sender, a float switch can't do it. Easiest is a universal adjustable sender in the cell, tube type or float arm. Measure the original sender empty and full with a multimeter, or look up the range your clocks expect. Then buy one with the same range, or a programmable one. If the range doesn't match the gauge reads wrong or sits at one end.