Ignition Red Warning Light

[Griffophenia]

Red ignition warning light glows occasionally on tick over & low revs!

any ideas!

Phil

[ewan221]

Every time its happened to me (past 3 cars though not my TVR) its been the alternator on way out

[SSPPGG]

slipping belt, tickover too low, or the alternator is tired.

[Hoover.]

I had this after we changed the alternator earlier this year....... had to have afew resistors changed, due to slight variances between original and replacement alternator

prior to altenator change my ignition light used to come on 2500 revs, the reverse of what I would expect..... Tivs never as expected

[THREEFISHORANGE]

Had the same on my alternator after a 18 month period off the road. It was the resistors/ modules at the back of the alternator, so i was told by the sparky. £35 later, as new again.

[PeteGriff]

Griffophenia said:

Red ignition warning light glows occasionally on tick over & low revs!

any ideas!

Phil

I have recently had the same, tried changing the regulator module (only £7), but ended up being the alternator! I got my replacement from a Land Rover online stockist (recognised it as the same as my Defender), £65 all in with pulley. All sorted. If you can afford it get a new alternator, they get cooked under the bonnet! Pete

[Griffophenia]

/quote]

I have recently had the same, tried changing the regulator module (only £7), but ended up being the alternator! I got my replacement from a Land Rover online stockist (recognised it as the same as my Defender), £65 all in with pulley. All sorted. If you can afford it get a new alternator, they get cooked under the bonnet! Pete
[/quote]

Cheers Pete, Which online stockist & part number!


Phil

[steve-V8s]

The charge warning light is connected to a switched 12v supply which comes on with the ignition. The other side of the lamp is connected to the alternator. When the alternator is generating correctly there is ( roughly) 12v on both sides of the lamp so it doesn’t glow. Alternators need a supply before they can work, mostly the supply comes directly from the battery via the big thick red cable which is also takes the charge back to the battery. In some cases the excitation voltage is supplied on a third wire. Just because the third wire is connected doesn’t mean it is used. On mine it was connected at the alternator but not at the other end.

As others say the symptom is probably a fault in the alternator itself, however it would be worth checking the big flat troublesome fuse in the thick red wire and the engine earth wire, if the alternator is not seeing enough voltage to get itself going that could be the problem.

[Griffophenia]

Thanks Steve, I will check the big flat troublesome fuse in the thick red wire and the engine earth wire, at the weekend.
Regards
Phil

[PeteGriff]

Griffophenia]/quote said:

I have recently had the same, tried changing the regulator module (only £7), but ended up being the alternator! I got my replacement from a Land Rover online stockist (recognised it as the same as my Defender), £65 all in with pulley. All sorted. If you can afford it get a new alternator, they get cooked under the bonnet! Pete

Cheers Pete, Which online stockist & part number!


Phil

Hi Phil, I purchased an AL152 Land Rover Alternator from this eBay Land Rover Shop:

http://www.ebay.co.uk/itm/LAND-ROVER-DISCOVERY-2-5...

Doing them for £62.99 so grab one and bolt it on. No fussing around changing the fan pulley over either. Regards, Pete