Electrical? Mechanical? Overheating no fan, no idea

An alchemy of sparks, copper wire and earth

Moderators: User administrators, Moderators

User avatar
Robsey
Registered user
Posts: 1159
Joined: 19 May 2012, 20:45
80-90 Mem No: 11137
Location: East Manchester

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.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished

User avatar
Mocki
Membership Admin
Posts: 16957
Joined: 29 Sep 2005, 09:27
80-90 Mem No: 428
Location: Mansfield Notts
Contact:

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 
Steve
tel / txt O7947-137911
👀
________________

1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper 
 

MoritzTheDoka
Registered user
Posts: 32
Joined: 25 Mar 2021, 14:39
80-90 Mem No: 0

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

User avatar
Mocki
Membership Admin
Posts: 16957
Joined: 29 Sep 2005, 09:27
80-90 Mem No: 428
Location: Mansfield Notts
Contact:

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
tel / txt O7947-137911
👀
________________

1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper 
 

User avatar
Mocki
Membership Admin
Posts: 16957
Joined: 29 Sep 2005, 09:27
80-90 Mem No: 428
Location: Mansfield Notts
Contact:

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
👀
________________

1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper 
 

MoritzTheDoka
Registered user
Posts: 32
Joined: 25 Mar 2021, 14:39
80-90 Mem No: 0

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

User avatar
Mocki
Membership Admin
Posts: 16957
Joined: 29 Sep 2005, 09:27
80-90 Mem No: 428
Location: Mansfield Notts
Contact:

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
👀
________________

1989 2.1LpgWBX HiTop Leisuredrive Camper
1988 2.1 Caravelle TS TinTop Camper 
 

MoritzTheDoka
Registered user
Posts: 32
Joined: 25 Mar 2021, 14:39
80-90 Mem No: 0

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

Post Reply