daveb666
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| posted on 10/9/13 at 12:24 PM |
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Charging Problem
A few weeks ago my starter motor jammed in the 'out' position so the car wouldn't start. I removed the starter at the side of the
road and jumped the car.
I didn't connect up the cables from the starter, and therefore the battery light was on. I drove home, a dstance of around 6 miles.
Starter motor was replaced for a brand new item the next day and fitted. Car started beautifully, but the battery light was still on ; battery showed
a reading of 12.4 when running (so confirmed as no charge).
General consensus between knowledgeable friends seemed to be that I'd blown the reg in the alternator because I drove home without the wires to
the starter being connected.
A new regulator was bought and fitted. Alternator refitted and I tried again - same problem, battery light still on and no additional charge to the
battery.
I therefore assumed that I'd broke something else in the alternator, so took it to the place that the starter motor/reg came from. They ran it
up on their test bench and confirmed that the alternator is working fine.
Soooo, wtf have I broke?
I'm 100% all the wires are correctly connected to the starter motor;
there's a large wire from the + battery to the starter
there's a large wire from the starter to the alternator loom which connects into the alternator
there's a small wire from the starter into the car (which I assume is the ignition wire)
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britishtrident
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| posted on 10/9/13 at 12:47 PM |
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From your post I take it was a pre-engage starter, I suspect you have left a wire off or connected it to the wrong terminal at the starter.
If you have an alternator with the old style 3 blade terminals ie 2 large 1 small.
If you pull off the plug off the alternator and probe the plug with a volt meter the 2 large spades in the plug should show battery voltage.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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r1_pete
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| posted on 10/9/13 at 12:51 PM |
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sounds like you have left something disconnected.
is your high current wiring battery to starter solenoid to alternator, maybe you've left the solenoid to alternator disconnected.
Put a meter on ohms, battery neg discomnnected, between the battery + and the big wire connection at the alternator, you should have continuity.....
If note you can trace back each connection in that wire and find where you have continuity.....
[Edited on 10/9/13 by r1_pete]
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ReMan
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| posted on 10/9/13 at 12:53 PM |
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Im failing to see any connection between running without a starter motor and bowing the alternator.
In normal use (once started) the starter motor serves no function.
Unless the alternator earth connects to the battery via the starter terminal?
Which would mean running the alternator with no load, which apparantly they dont like and could? case a higher than normal output voltage
However you had the alt checked so its not that now.
Very odd!
Check relevant fuses, I wonmder if youve fried the dash electronics. Is everthing else working normally?
Stock answer in these cases is check your earths!
www.plusnine.co.uk
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daveb666
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| posted on 10/9/13 at 12:53 PM |
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Thanks for the quick replies - I should have said that in the middle of all this I've binned the standard management/inlet and fitted throttle
bodies.
I just found this thread:
http://www.locostbuilders.co.uk/viewthread.php?tid=179454
Seems like this is my problem and I have some re-wiring to do!
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britishtrident
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| posted on 10/9/13 at 02:34 PM |
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quote:
Originally posted by ReMan
Im failing to see any connection between running without a starter motor and bowing the alternator.
In normal use (once started) the starter motor serves no function.
Unless the alternator earth connects to the battery via the starter terminal?
Which would mean running the alternator with no load, which apparantly they dont like and could? case a higher than normal output voltage
However you had the alt checked so its not that now.
Very odd!
Check relevant fuses, I wonmder if youve fried the dash electronics. Is everthing else working normally?
Stock answer in these cases is check your earths!
It is quite common to connect the alternator outputs to the main 12v cable to the starter rather than run them to the battery or a fuse box.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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big_wasa
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| posted on 10/9/13 at 05:44 PM |
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The alternator is a standard Lucas alternator, as used on the good old pinto and many other fords of that era like the escort. The alternator is
indeed looped to the starter terminal as is pretty standard.
The regulator in the alternator will have blown due to a dead short on to the chassis rail due to the cable being left hanging after removal of the
starter.
The problem is either the wiring has not been put back as it was or there is a loose connection on the naf lucas 3 pin wiring connector.
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adithorp
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| posted on 10/9/13 at 07:12 PM |
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Starter normally has 2 wires. Main large feed from the battery and a small triger wire to the solenoid. The feed from starter to alternator is just
connecting the battery to the alternator and going via the starter is just optional way of doing it.
Is the large wire coming from the starter to the alternator on the same terminal as the one from the battery. It should be.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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