Electrical? Mechanical? Overheating no fan, no idea

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Robsey
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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.
1983 Tin Top with a poorly DF and 4 speed DT box.
Soon to have a whizzy 1987 DJ.

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Mocki
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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 
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MoritzTheDoka
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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?
1983 doka
1.9DG 4 speed

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Mocki
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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.   

 
Steve
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1988 2.1 Caravelle TS TinTop Camper 
 

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Mocki
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post by Mocki »

To understand further, have a read here......
https://wiki.club8090.co.uk/index.php/C ... ht_on_dash
Steve
tel / txt O7947-137911
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1989 2.1LpgWBX HiTop Leisuredrive Camper
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MoritzTheDoka
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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
1983 doka
1.9DG 4 speed

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Mocki
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post by Mocki »

Gauge out and test the actual led then I would say ...  
Steve
tel / txt O7947-137911
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MoritzTheDoka
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Re: Electrical? Mechanical? Overheating no fan, no idea

Post 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! 😆
1983 doka
1.9DG 4 speed

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