kimcrwbr1
Well-Known Member
- Joined
- Dec 6, 2009
- Messages
- 6,044
- Reaction score
- 46
- Points
- 48
- Location
- maplevalley WA
- Vehicle Year
- 1983
- Make / Model
- ford
- Engine Size
- 2.8l
- Transmission
- Automatic
The 1 wire is the sending unit to the guage pull it off and touch it to ground with the key on it should read all the way hot. the one with two wires is for the computer to tell it how to control the fuel mix cold vs hot and other things. If you have a volt ohm meter you can check the wire to the sender 1 wire it should have around 8 volts that pulses. All the guages run on the same power supply if you check the wire to the oil pressure sender it should have the same voltage as the water temp sender if not the guage may be bad like i was saying the connector for the water temp somtimes gets loose or corroded giving you an intermittent signal to the guage. just take a pair of pliers and crimp it a little so it pushes on tight and see if that does it.