hey guys i have the car running good but the only gauge that works is the fuel gauge. Any ideas why the others are not all fuses are good and the cables on the back are plugged in nice a tight with dielectric grease on them. any suggestions on what to cheek next. thank you

 

When the meter fuse blows, evething except the tach and speedo quit. Since you have 1 working gauge, it's either the senders, wiring, connector at the back of the instument cluster, or the gauges themselves.

 

ok the volt meter in the speedometer works some times and the speedometer worked the day i bought the car. what should i check and were is it. thank you

 

Well, your profile says you have a 1997 Rx7, I'm not sure if I can provide any tech help on that new of a model.

Are you sure the connections are clean at the senders and the wires are good? An intermittant voltmeter may indicate a charging or connection problem with the alternator, which could affect the gauges. Other than that, I listed most everythng to check other than how to determine if the gauges themselves are good, which requires cluster removal.

Fwiw, the speedo is mechanical, not affected by electrics and the tach gets it's signal from the trailing coil, assuming you have an electronic dizzy.

 

my bad it is a 79 sorry i fixed it

 

how do you cheek the sender. via pin out to test it with a multimeter.

 

what did you do to fix it? i have a similar issue so what was wrong with it?

 

oh never mind you fixed your profile....my bad

 

The voltmeter on the 79s only work wtih the key on, engine off, after that it reads rpms for the tach. Ignore my comment about charging/electrical problems in this case. Since the 79 has no oil pressure gauge, all that's left is the temp gauge. Sender is under the oil filter with a single wire attached to it.

 

ok there is a yellow wire that is not connected to any thing right under the coils in the fender is that the wire and where in the back coil does it go. Both coils have the came same amount and color of wires coming out of them. I found where the wire should connect under the beehive cooler i have the connector off and where should the wire go to from it. thank you

 

Temp sender wire is yellow with a white stip. Wire under the coils is not it.

 

ok speedo works now.

 

ok there is no yellow wire with a white strip i can wire it to the temp sender but where do i wire it yo from there i have the connector off and have 15 ft od 14 gauge wire.

 

take some pics

 

I will post pics when my girl gets back with the cammera