MF 135 - Mystery part

CaribooHarry · Nov 26, 2013

This part was found behind the dash of my MF135 with Perkins diesel. The only make on it is "WICO".

The wiring harness had three connections which might have reached the lights on some instruments. It was not connected from anything or to anything.

Any idea what it is or its purpose.

John Kruer · Nov 26, 2013

Sounds like it is the power supply for the instrument panel lights. The 135 originally had the gages that seemed to glow instead of the traditional bulbs.

CaribooHarry · Nov 26, 2013

Pictures!

Dieseltech · Nov 26, 2013

John has it right, transformer for the dash gauge set. Gauges had a green glow to the when the lights were on.

chuck kaufman · Nov 26, 2013

All my 135"s except for the oil pressure gauge glow green,is a lighted replacement gauge still available? Thanks chuck k.

CaribooHarry · Nov 26, 2013

The wiring which is not shown in the photos would support the idea that this devise feed the instrument lights. I would like to know more about how the system works?

John Kruer · Nov 27, 2013

It is my understanding tat they are hard to find as well as the transformer. Hold onto the transformer.

John Kruer · Nov 27, 2013

I had the same question earlier this year when I bought my 135. Put "135 guage lighting" in the search and you will see a picture from Steve on what the gage lights are suppose to look like at night.

Tom from Buckeye Lake · Nov 27, 2013

My 150 had that transformer, didn't work. Read somewhere on here that it converts the 12 volt DC to over 100 volts AC to run the lamps in the gauges. I guess the gauge lamps are non-repair.

CaribooHarry · Nov 28, 2013

I put the volt meter on this thing, it reads 12 volts when the
device is in the curcuit but those 12 volts won't light the
smallest bulb I have.

Hopefully someone on the forum can explain how it works.

Joe Ferguson · Nov 29, 2013

The original gauge lighting will not work with 12 volt it need high voltage.

The gauge illumination (on this model) is produced with kind of fluorescent bulbs that needs high voltage produced by the power inverter (your photo).

Usual gauge illumination is produced by incandescent 6 or 12 volt bulbs which can be connected directly to the batery voltage.

It is possible to use a very little voltage inverter 12 volt DC to 115 volts AC and then rectify the voltage at the output to obtain high DC voltage neccessary to light the bulbs. Do not attempt to do that if you are not expert in electronics otherwise fire and/or electric shock hazard.

At my knowledge the module is no longer available for long time. The principal reason for the module failure in the past was when the owner replaced a gauge with a 12 volt bulb and connected it same as the other gauges which were original the module burned due to the high resistance of the 12 volt bulb.

So...for those that the original fluorescent gauge
still works do not connect an 12 volt bulb to the circuit the concerned module will burn almost instantly.

HTH

Joe Ferguson

Marc.France · Feb 9, 2014

Hi
Where can I buy this part ? Thanks for your help

MF 135 - Mystery part

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