24-03-2023, 08:15 AM
Thanks for the advice chaps, very helpful as always.
I have many books and articles, I will check if the electric guide I have is by Harry Hales.
The problem is putting all this academic knowledge into practice without blowing anything up! So far so good.
My cutout definitely doesn’t work. If I close it with my finger it stays shut permanently, even with the ignition switched off.
I have figured out that I could bypass the cutout with a manual switch in the car.
More intriguing problem today is that the dynamo is producing electric, up to 9v and cruise speed, as measured at the D terminal. However, this voltage isn’t getting through to the ammeter / battery.
I’m very suspicious of the SM5 switch panel. I don’t think it’s wired the same as the wiring diagrams in the books.
My plan for this morning is to remove the wires from the switch so that I can work out which contacts make and break when the switches are operated. It’s the only way I can see to get to the bottom of the problem. These switch units are very clever in the way they operate different circuits at the same time.
On the upside, my new LED bulbs are brilliant. Virtually no current draw compared to the filament bulbs as measured by the ammeter. I can now use the side / rear lights as daytime driving lights.
Also while fiddling with the main switch panel I found a damaged wire going to the fuel gauge, now that works properly for the first time since I’ve owned the car!
Richard.
I have many books and articles, I will check if the electric guide I have is by Harry Hales.
The problem is putting all this academic knowledge into practice without blowing anything up! So far so good.
My cutout definitely doesn’t work. If I close it with my finger it stays shut permanently, even with the ignition switched off.
I have figured out that I could bypass the cutout with a manual switch in the car.
More intriguing problem today is that the dynamo is producing electric, up to 9v and cruise speed, as measured at the D terminal. However, this voltage isn’t getting through to the ammeter / battery.
I’m very suspicious of the SM5 switch panel. I don’t think it’s wired the same as the wiring diagrams in the books.
My plan for this morning is to remove the wires from the switch so that I can work out which contacts make and break when the switches are operated. It’s the only way I can see to get to the bottom of the problem. These switch units are very clever in the way they operate different circuits at the same time.
On the upside, my new LED bulbs are brilliant. Virtually no current draw compared to the filament bulbs as measured by the ammeter. I can now use the side / rear lights as daytime driving lights.
Also while fiddling with the main switch panel I found a damaged wire going to the fuel gauge, now that works properly for the first time since I’ve owned the car!
Richard.