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Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 19 Apr 2021, 23:48
by Robsey
I fired up my dash panel the other day, with nothing else attached,
and the red LED still flashed for about 5 seconds.
(With or without the 42 / 43 control unit connected.
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 20 Apr 2021, 07:40
by Mocki
That will be the capacitor charging and discharging to perform the test then, not sure if that would happen id the rest of the circuit is plugged in and taking the load . Mine wouldn’t self test with the control disconnected iirc
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 21 Apr 2021, 18:20
by MoritzTheDoka
Hmmm, so I'm still none the wiser
I don't suppose anyone knows which wire, or trace connection on the flexy ribbon PCB behind the cluster is the led feed so I can test for a signal?
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 21 Apr 2021, 18:45
by Mocki
MoritzTheDoka wrote: ↑21 Apr 2021, 18:20
Hmmm, so I'm still none the wiser
I don't suppose anyone knows which wire, or trace connection on the flexy ribbon PCB behind the cluster is the led feed so I can test for a signal?
The temp gauge led is controlled by a circuit in the gauge itself. The circuit can be triggered by earth faults and voltage changes.
module 43 (or 42 as there are two types) sends a series of pulses to the circuit inside the temp gauge, these pulses trigger the led and continue until the ignition is switched off. If your temp gauge led is flashing intermittently while you are driving it is unlikely to be the module 42/43.
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 21 Apr 2021, 18:48
by Mocki
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 21 Apr 2021, 19:44
by MoritzTheDoka
Mocki wrote: ↑21 Apr 2021, 18:45
MoritzTheDoka wrote: ↑21 Apr 2021, 18:20
Hmmm, so I'm still none the wiser
I don't suppose anyone knows which wire, or trace connection on the flexy ribbon PCB behind the cluster is the led feed so I can test for a signal?
The temp gauge led is controlled by a circuit in the gauge itself. The circuit can be triggered by earth faults and voltage changes.
module 43 (or 42 as there are two types) sends a series of pulses to the circuit inside the temp gauge, these pulses trigger the led and continue until the ignition is switched off. If your temp gauge led is flashing intermittently while you are driving it is unlikely to be the module 42/43.
No, as mentioned above... It doesn't work at all... Ever.
Not on start, not when the temp sender is bridged, not when the coolant level sensor is removed - never
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 22 Apr 2021, 07:53
by Mocki
Gauge out and test the actual led then I would say ...
Re: Electrical? Mechanical? Overheating no fan, no idea
Posted: 23 Apr 2021, 18:27
by MoritzTheDoka
Mocki wrote: ↑22 Apr 2021, 07:53
Gauge out and test the actual led then I would say ...
I think that's the way forward
One slightly more broken gauge coming up!
