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#1 Re: Maintenance » 2007 Dispatch Alternator Trouble » 2023-08-23 14:45:47
Appreciate that info - definitely got a working battery light but one I'll remember for future.
Took the voltage reg off and found a bigger issue... guess the armature is damaged and causing it to arc. Ordered a new alternator and reluctantly going to tackle fitting it myself tonight. Hopefully not a wiring loom fault that will kill the new part ... just crossing my fingers at this point in the name of having it back on the road quick!!!
#2 Re: Maintenance » 2007 Dispatch Alternator Trouble » 2023-08-22 22:06:15
Pretty good with electrics myself but more at home with 415V than 12!
Two connections to my alternator - big positive terminal I've been sticking my meter on and a sensor connection with a single wire - this could be the "exciter" you talk about?
My logic is thus - if there was a fault with the rotor/stator then the problem would, surely, not be temporarily fixed by replacing the regulator. It going bad after some time stinks to me of intermittent wiring faults (or a run of really bad luck with el cheapo replacement regulators...) ... this is why I jumped when the idea of a poor engine ground occurred to me earlier. Sadly that seems to have been a non starter. (ha ha. cry.)
With a 'good' regulator on it reads at 14.4V even at idle, it doesn't seem to need a throttle 'blip' to trigger like others talk about... may be a MK1 thing?
#3 Maintenance » 2007 Dispatch Alternator Trouble » 2023-08-22 20:12:10
- freneticscribbler
- Replies: 4
Hi all,
Recently become the owner of a 2007 1.6 Dispatch. Battery stopped charging a while back - showing 12V across alternator output to ground with the engine running. So I swapped the voltage regulator (/diode pack whatever you want to call it) out. Looks like the brushes were worn to nothing on what was probably the OEM part. Fair enough. Sorted - solid 14.4V in the system with the engine running.
Few weeks later, same issue - no output from the alternator, battery gradually dies. I replaced the voltage regulator again figuring it was a cheap part dud from the factory. Again. Sorted for a bit, until again a few weeks later when the same issue reappears.
I've no issues biting the bullet and replacing the whole alternator but I'm worried that will also only last a few weeks. I've a good auto electrician coming to take a look in a week, but I'd obviously rather get back on the road before then. Any ideas?
I've tried:
- different, known good battery
- removing and cleaning battery ground strap
- directly connecting battery ground to engine metalwork near alternator (trying to bypass any ground strap issues)
- to find out if there's a fuse for the charging circuit - I believe there isn't one?
Needless to say, I'm going to fit a voltage gauge whatever happens !
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