Club 80-90 Forums

Anybody know anything about this.

I have 12V ( even though wiring colours on van are wrong) +12V to the black on fridge neg to blue on fridge but no light when I switch on.

What's strange is I don't have 12V on the ignition module between any two pins which implies switch but when on the top two poles of the switch are connected and buzz with meter grey to blue, can't work out what the connections on the module are to bypass switch anybody know?







this pic from another fridge implies the switch is wired right I had wondered if somebody had wired the switch wrong before.

Without getting it in my hands - '+' on ignition module appears to be going to earth. Earth on switch/chassis appears to be going to live? Has the fuse gone now?
I would get the same polarity wires to be the same colour, it will be easier to trace. Leave unused snap connectors unlatched would make it clearer as to the wiring route as it is difficult to see at present.

+ on module black wire is 12v, the van wiring is wrong, (swap them as I tried and fuse blows)

it looks neg switched, possibly because of light.

i'm guessing switch is shot it shows continuity between top pins but it's intermittant, that I tbink is the negative switchng
Module may be shot too which is why I want to test.

I guess module markings are
+12V black wire
L lamp blue wire ( strange blue is neg at switch)
earth type down arrow symbol grey wire

German vehicles and heaters all have black as a live carrier, blue will be earth - you have ignition module +/black going to earth at the connector.
Centre of switch (earthed to chassis/fridge) appears to be going to live at connector.
(E D I T - not being used conventionally here -Earth on switch is usually purely for function of indicator light and isn't switched at all.)

So, in the picture above;
+ = obviously 12volts from the battery
IGN = this goes to the switch and is the signal that causes the switch light to flash
Gnd = this goes to the switch - and then clicking the switch grounds this wire to start the ignition process

So you won't see 12v across any two wires because the Gnd wire is floating unless the switch is pressed.

Quick gooogle:

The wiring should be as follows:
Blue from terminal block - to centre terminal on switch and to common earth point on fridge.
Grey from top terminal on switch to earth terminal on electronic igniter
Blue from lower terminal on switch to L terminal on igniter box.
Black from terminal block + to + terminal on igniter box.
Igniter lead from Flash symbol on igniter box to igniter tip at burner.


Cooking dinner so can't check how it relates to the bird's nest above!

Which is positive in as it is - black or blue? Where does that centre blue go - positive or earth?
I think that wiring it conventionally with like coloured wiring carrying the same would eliminate the confusion.

Thanks OBG, a clearer pic I hope,
Black is +12V
blue centre of switch is ground to fridge and battery
grey must be the light

can't see anything wrong I think duff switch and perhaps duff module.

MidLifeCrisis wrote:

So, in the picture above;
+ = obviously 12volts from the battery
IGN = this goes to the switch and is the signal that causes the switch light to flash
Gnd = this goes to the switch - and then clicking the switch grounds this wire to start the ignition process

So you won't see 12v across any two wires because the Gnd wire is floating unless the switch is pressed.

yes you are right but I checked the switch on a meter and it looked OK ( top grey shorts to middle blue when switch on) but I think what's happening is as I put the wire back the switch no longer works it's intermittent.

I have tried shorting the top grey to middle blue on switch bypassing the switch but nothing happens

What is so confusing is the module has a lower blue which I think is not ground but the lamp wire

Surely it should be intermittent as the igniter fires with the concurrent light flash?
Grey will be the switched ground/neg.

intermittant when tested with a multimeter

Will have another look tomorrow and report back

good news is fridge works when lit with ciggy lighter

thanks for your time

yes you are right but I checked the switch on a meter and it looked OK ( top grey shorts to middle blue when switch on) but I think what's happening is as I put the wire back the switch no longer works it's intermittent.

I have tried shorting the top grey to middle blue on switch bypassing the switch but nothing happens

What is so confusing is the module has a lower blue which I think is not ground but the lamp wire

Have you confirmed you've got 12v on the black wire into the '+' of the igniter module? (You can use the fridge metal as the ground reference)
With the switch turned on you should be able to measure 12v between the black wire and the grey wire as they go into the igniter module?
If so it might be that the spark wire is not able to create a spark - maybe it has shifted, you'd need to take a look round the back where the spark wire ends

Deffo 100% got 12V on black (also tried a seaperate feed)
Deffo got ground to fridge on blue centre to switch.

It's working now.
Cleaned up the electrode, shorted the top grey wire to the middle blue ( ground) and after a few seconds it fired and lit, great, but still no light.

So took switch appart clean all contacts including spring which is the part of the light circuit, stretch spring, tweaked contact a bit, reassembled all works.

light only flashes on spark

Thanks for the help.

Excellent - glad you got it sorted