What is it? Random Dash Electronics - 93 200tdi defender 110

[UBZ]

I had my dash apart to move some guages and install a tach and came across this covered in foam and wired into the dash loom just behind the guages .


Anyone know what it does ? I've looked through the factory wiring diagrams and can't identify it .
I thought my 110 was essentially electronics free. Is this a factory item or aftermarket meaning I can rip it out ??

[goingbush]

does it have a serial number or part number etched into the pcb on the solder side. can you take a photo of the solder side showing the tracks, it will be easier to identify.

[langy]

Highly possible that the previous owner installed it as a power supply regulator for the dash gauges. ie drops 12v down to 10 or 5 volts for the fuel, oil, temp etc.
That or something for the hazards. See where it connects to loom and see what wires are used.

[85 county]

what are the wire colours

black is earth, white will be a power ( white red trace is dash lights) green black trace i think is fule gage and green with blue is temp, i think. but i can check when i get home.

[ade]

its obvious your under survelliance from the goverment

[flagg]

Highly possible that the previous owner installed it as a power supply regulator for the dash gauges. ie drops 12v down to 10 or 5 volts for the fuel, oil, temp etc.
That or something for the hazards. See where it connects to loom and see what wires are used.

I can't see a normal voltage regulator that would be used (like a 7805) so I don't think it would be that. The 8pin IC is too small and would need a heatsink.

What is written on the 8 pin IC? 555? If so, it could be a musical horn circuit or hazard lights.

[flagg]

It might be a frequency to voltage converter for a tacho like a LM2907.

[mike_ie]

Looks like a 2904 op-amp, hard to tell in that photo. Any chance of a close-up of the chip??

[Red90]

What is it connected to??? That should tell you a lot...

[Red90]

If that is a white/slate wire, it should be the wire to the alternator for the tach signal. Might be some sort of signal conditioner. Nothing is in the factory wiring schematics.

edit: Hang on. W/S can also be the low fuel warning. Probably a unit to determine when the level is low. Green/Black is the fuel level signal and W/S goes to the light.