Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Dash Switches - PCB Protection 2003-2007 Morgans

Hi Julian,

Can you share any more details on what the auto electrician did? Did they go back to basics I.e flasher units and replays. I have been told the 2003 35th Anaversairy +8 is setup like this, same pannel but no PCB behind it..

Was thinking given the indicators are likely cause of the issues, if you put an inline fuse on the indicators would that prevent the issue?

Many thanks
Will

Although fuses and relays have their place the seemingly knee jerk reaction by some of adding them creates another level of unreliability not to mention potential volt drop (see what I did there). Tracing one circuit on my car I found a total of four fuses, simply to ensure another circuit fed from samè battery source had one. KISS rules in electrics.

The 2006 to 2014 era of various PCB iterations all open to the elements was a bad one for Morgan. The advent of the sealed body control unit (BCU), already adopted by the rest of the car industry, was huge step forward in reliability taking over all the conditional tasks of the PCB plus a lot more whilst also communicating with ECU via CANBUS.

The extent of the work is waaaay above my pay grade.......!!
But as far as I know relays and wiring were involved.......🤷🏻‍♂️..... but, crucially, it now works.....😂
I was amazed that a fuse didn't blow before the pcb went.
The indicator fault was a wire that had rubbed through.
Part of our battle initially was the fact that no one, not even the factory, had an accurate wiring diagram. Several dealers and the factory sent me all they had but the lack of detail was incredible.

🇬🇧🇬🇧

Having changed my lollipop lenses for clear I discovered that the Fog light switch is not operating in that it will not click on. Is there a simple fix for that. It is quite likely it was rarely used. But it will be an MOT fail later this month.

Any ideas.

I'd first check the fog light itself for bulb, feed contact and earth which is generally at the lights mounting point. There was usually a rudimentary card showing what your car fuses were supplying, glove box service book etc are where you should find it as that is your next port of call. Then behind the dash for supply, pre and post switch and then feed live from the switch.

However I don't want to alarm you but fog light issues can indicate a PCB issue.

That’s is helpful. I feel the push switch is just not staying in position, but I will now check as suggested. Thanks.

Further investigation shows the fog light unit and bulb looks fine. When I remove the lense I can see the switch has a tell tale glow when the ignition is on like the others but when the switch is pushed in that glow goes out and the warning light does not function. Does that suggest a faulty switch or a fault with the PCB. I am no electrician, so any further knowledge will be most helpful.

Robin, the fog light switch isn’t a latching switch, it’s a momentary switch. The only one of four that isn’t latching. And don’t forget it will only latch/function when the main lights are on.

Regarding the fuses, the factory did notice that the PCB was functioning as a fuse when there was an indicator fault and started adding extra fuses on some later cars. They’re not that difficult to add. They are located behind the dash.

How amazing. I will go and have a look. Thanks. This is such a fantastic source of help and advice.

You were so right. What a chump I am. Many thanks. You made my day! All working as they should.