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ECU's and Electronics

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bfit:
Have you changed the battery in the multimeter
Bfit

Vettech:
Volt and ammetres do not require batteries.

But this here Ipad does - good night.

bfit:
Arr and then there is ohms , resistance ,
To battery or not to battery that’s is the question
Bfit

Vettech:
This car was fine for many years, but then started to eat H4 headlight globes, some one said the Alt output is set tooo high. Was fine each time I checked.
If going over 80kph I would always put headlighrs on - new cars call this "daytime running lights", so blowing globes Would be inevitable.

But if Alt and wiring was defective, causing short stints of over voltage, then no wonder the globes went.

But this would eventually cause kaos with the electronics.

I've now replaced both Batt, wiring and Alt.
Voltage is 13.8 - 14.4, does not miss a beat, irrespective of loads. (A/C Highbeam etc)

We also have a Jaycar $14 el cheapo digital display voltmetre taped to the dash and reading volts at Cigar lighter. In field of vision, easy to read.

Car now cuts out more than ever, but Alt output is constant, we are now down to the last faults, most likely caused by long term high Alt outout.

Now it goes to Ford........... there is no choice, the ECM Iookes tobe epoxy filled, changing electrolytics or capacitors is out of the question.

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