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Jensen Monday Club |
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This was a question posted on the British Steel e-mail list: "Can anyone help with the following questions, I'm still having problems. The voltmeter on the dash now climbs well into the red to 15v, whether headlamps on or not! When at idle it drops a bit. It seemed to be ok with the new alternator for the first 20 miles, but now climbs scarily. I find that the mechanic had replaced the silver box near the fuse box (about 2 inches long, less than an inch wide, and an inch or so high). I'm not sure he replaced it with the correct Lucas part, and the reason for replacement was a bit vague (loose wire type thing). I believe it is the "voltage stabiliser". I think this is different from the voltage regulator. What does it do? He said it was a relay, is it? Does this particular item respond differently under load, or under different vehicle temperatures? All seems a bit odd to me. I'd be really grateful as always for any comments. What else could cause the voltage to climb like that? I replaced the voltage regulator a year ago along with a new alternator (the one I replaced again as it was burning out)". Steve Payne Replied: I had a similar problem but it was caused by a bad connection on the main power lead .There is a junction in the main power wire (thick brown wire) from the alternator to the battery just below the brake reservoir's. It seemed OK but had a very high resistance and fell apart when I pulled on it. I made a new connection and the problem was cured. I now have a new wire with no breaks in it that leads from the output of the alternator to the battery and everything has been good since then. The response was: Steve You were right. I copied your comment to the electrician. The wire to the battery had gone high resistance for some reason, and the one of the cells on the six moth old battery had gone for some reason. New wire, new battery, hey presto! Thanks again.
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