temp & oil gauge not working
yes it bothers me but I did find that with a test light I get the blinking coming out of the fuel gauge circuit board stud that travels to the temp harness pin. in fact I think I have 3 studs that are blinking and 2 others that are hot. I just may start at square one and us a volt meter on the wire that connects to the water temp sensor and see what voltage is says.
terry
OK let's step back a bit. Earlier you said you have "aftermarket gauges." You did not explain this. Are you talking about typical under dash add on gauges, or did you find something that replaced your original in-dash gauges.
Going around testing for blinking and voltage does you no good if you don't know what you are looking for.
You need something for test resistors to replace the senders OR get one of the senders so that you can measure it's resistance and know what to expect.........see my earlier thread........ There are three known resistances in the old factory test box. This is in the shop manuals, the box, that is. One resistance produces the "low" scale reading, the second produces "mid" or 1/2 scale, and the last produces full scale. These readings are same whether fuel/ oil/ or temp gauges. If they all read off about the same, you likely have IVR problems which I repeat ONCE MORE is inside your fuel gauge.
If one or two is off or by differing amounts, or all three by differing amounts you have OTHER problems and possibly IN ADDITION to an IVR that is bad
Best thing to do is piggyback a SOLID STATE replacement IVR onto the fuel gauge and disable the internal one. Do a search. There are websites that detail this. And you must be careful
If that does not fix the problem, and one gauge reads different with the same test resistor, then that gauge has a problem or the CIRCUIT TRACES AND CONNECTIONS to and from that gauge.
If you get all that to work correctly, then worry about body wiring and individual sensors......which again, you can test at the sensor / wire connection with test resistors
