yourpete wrote:
>During night driving I have noticed that the head lights vary in
>brightness. They brighten up at about 2500 to 3000 revs and dim when
>the revs drop. But when in say 4th or 5th gear at about 1500
>revs(Diesel model) and I lift off the accrelator the lights
>brightenup?. Strange. This will voltage varation only happens AFTER
>the engine has warmed up. The brightness varation is also noted if you
>over-ride the interior lights. My garage has replaced the control unit
>but no change. Any suggestions. The battery and alternator have been
>FULLY checked out and found to be OK.
>
I had this same symptom when I swapped in a JDM B18C into a USDM 96 Civic.
The problem was the fact that the USDM car had an Electical Load Detector in
the under-hood fuse box and the JDM ECU does not use one so it was confusing
the JDM ECU and it was "telling" the alternator to stop charging when I would
press on the accelerator. I remover the ELD and all is fine now. It could be
that your ELD (if you have one) is bad, or the connection to it in the under-
hood fuse box needs cleaned.

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