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Old 25 November 2008, 20:24   #1
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Toasted connector (Alternator)

I've had a problem with my little Rover 214 where the connector that plugs into the Alternator has overheated and is just about to fall to bits.

I guess the overheating is because of a loose or high resistance connection as the rest of the alternator looks and operates OK.

I have three wires going to the connector. One is the ignition light and the other two join together and go to the + on the starter motor soleniod (altho I can't physically find the join but is shown on the electrical diagram).

As this connector is going to be difficult to find a replacement can I either simply chop the two feed wires and crimp them to a ring terminal to fit on to an electrical post that's on the alternator and is outputting 14.6v at tickover. Or can I simply chop the wires and run a new wire around the engine bay, to connect to the + of the battery, I guess this would have to be fused?
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Old 25 November 2008, 21:49   #2
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You could do either of those provided your crimping is good so as not to cause another overheat situation. For info, normally the ignition light cable is used to energise the alternator field coil to produce the magnetic field for the alternator to work. As soon as the alternator produces current, it then provides its own field current which is also applied to the end of that cable at the alternator, hence the current ceases to flow from the ignition supply. There's maybe a series diode in there to prevent the alternator current charging back via that cable and the ignition switch.
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Old 26 November 2008, 11:34   #3
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You can do either, but any auto electrics place will keep the proper connector for the back of the alternator, which may be neater, but no more effective than running a wire from the batt + to the B+ post terminal on the alternator as you suggest usually No fuses in this wire unless a really modern car.
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Old 26 November 2008, 14:31   #4
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I take it a 32 amp wire or heavier is needed for the run?
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Old 26 November 2008, 16:13   #5
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I take it a 32 amp wire or heavier is needed for the run?
You're gonna need bigger than that. Find your alternator output and add some on for safety.
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Old 28 November 2008, 11:53   #6
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I remembered an Auto Electrician I used several years ago and payed him a visit today. He had a plug, however the wires came out in the wrong direction and with the loom so short won't fit

He rang his suppliers and was told that they couldn't supply plugs with the opposite take off

I've since rung around a few Motor Factors since returning home and the concensus is that it is a main dealer part.

There are no main Rover dealers

Any Ideas guys?
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Old 28 November 2008, 12:22   #7
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Was that Vic Harrison? He's very good indeed and based around your part of the world (last time I dealt with him he was in Salisbury Terrace, Lee on the Solent). If it wasn't then it may be worth giving him a shout for a second opinion. 02392 552334
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Old 28 November 2008, 12:23   #8
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Hightower.

Can you not extend the wires and add the new plug you saw earlier?

I've lots of different cable sizes in my garage if you want to bring it around so we can have a play.

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Old 28 November 2008, 13:02   #9
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Was that Vic Harrison? He's very good indeed and based around your part of the world (last time I dealt with him he was in Salisbury Terrace, Lee on the Solent). If it wasn't then it may be worth giving him a shout for a second opinion. 02392 552334
Yes it was Vic. Last time I used him he installed a heater matrix
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Old 28 November 2008, 13:05   #10
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Hightower.

Can you not extend the wires and add the new plug you saw earlier?

I've lots of different cable sizes in my garage if you want to bring it around so we can have a play.

Nasher.
Thanks Nasher, that's what Vic already suggested. However he hadn't got heavy enough duty wire to extrend the wires. I'll have a look myself over the weekend, so expect a call on Sunday
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