Guys,
This forum is awesome thank you in advance for the help...finally got the 40 running (after new carb, rear main seal, oil pan gasket, valve adjustment, clutch/throw out bearing work, rear output seal, fan clutch, new cooling hoses, thermostat, water heater, radiator, cooling system flush (it was bad), voltage regulator, etc.), but the instrument panel wasn't working and I couldn't tell if I had oil pressure, engine temp, fuel level or speedo.
Note: the previous voltage regulator was burnt out...and apparently had burnt quite a few wires (which I replaced after installing a new regulator).
It's a 1975 FJ40 with a 1980 2f that the PO installed. He also apparently had some interesting wiring ideas. I removed all smog/emissions wiring that I'm sure wasn't connected correctly (I'm in CA but 1975 is the magic year...so desmogged).
So, got to work on the wiring to figure out the water temp issue...ordered a new sensor, traced the wiring to connect it (it was missing)...and after install, the only thing working on the instrument cluster is the Amps. I also attached the oil pressure sensor wiring (might need a new sensor), but that didn't work either. Neither wires (at the sensor) read any voltage.
Instrument cluster connector (round connector with roughly 10 wires) has no voltage and the only voltage that shows up on the instrument cluster is the amp wiring (shows roughly 12v).
I had to re-wire light switch per the wiring guide due to burned out wires and random wiring...light switch has no voltage and none of the lights work...except the brake lights.
Stock fuse panel and all fuses except 7 are at roughly 12 volts. Fuse 7 which I think is the IG Coil reads 7.3 volts.
Motor starts and runs well (except for the exhaust leak).
I'm at a point where I need help. The circuit board on the back of the instrument cluster might have 2 burnt spots (I can't tell) and I suspect this may be the issue? I can't figure out why none of the lights work and none of the instruments work. Can I replace the circuit board...or do I need a new instrument cluster? Anybody have any ideas?
Thank you!
This forum is awesome thank you in advance for the help...finally got the 40 running (after new carb, rear main seal, oil pan gasket, valve adjustment, clutch/throw out bearing work, rear output seal, fan clutch, new cooling hoses, thermostat, water heater, radiator, cooling system flush (it was bad), voltage regulator, etc.), but the instrument panel wasn't working and I couldn't tell if I had oil pressure, engine temp, fuel level or speedo.
Note: the previous voltage regulator was burnt out...and apparently had burnt quite a few wires (which I replaced after installing a new regulator).
It's a 1975 FJ40 with a 1980 2f that the PO installed. He also apparently had some interesting wiring ideas. I removed all smog/emissions wiring that I'm sure wasn't connected correctly (I'm in CA but 1975 is the magic year...so desmogged).
So, got to work on the wiring to figure out the water temp issue...ordered a new sensor, traced the wiring to connect it (it was missing)...and after install, the only thing working on the instrument cluster is the Amps. I also attached the oil pressure sensor wiring (might need a new sensor), but that didn't work either. Neither wires (at the sensor) read any voltage.
Instrument cluster connector (round connector with roughly 10 wires) has no voltage and the only voltage that shows up on the instrument cluster is the amp wiring (shows roughly 12v).
I had to re-wire light switch per the wiring guide due to burned out wires and random wiring...light switch has no voltage and none of the lights work...except the brake lights.
Stock fuse panel and all fuses except 7 are at roughly 12 volts. Fuse 7 which I think is the IG Coil reads 7.3 volts.
Motor starts and runs well (except for the exhaust leak).
I'm at a point where I need help. The circuit board on the back of the instrument cluster might have 2 burnt spots (I can't tell) and I suspect this may be the issue? I can't figure out why none of the lights work and none of the instruments work. Can I replace the circuit board...or do I need a new instrument cluster? Anybody have any ideas?
Thank you!