Thread: 300 Tdi tacho problem

The tacho is driven by a feed from one phase of the alternator. Check the connector at the alternator.

Never thought of the alternator, thanks I'll have a look.

I do not wish to put a hex on you, but last month my taco did the same a number of times and then died. No warning lights on the dash but after checking connections and finding all ok, threw on a muliti meter and found Alternator had dropped its bundle. Confirmed at Auto elec, Alt dead $320 later taco works. Godo luck might also be the spade terminal at the back of the alternator. Give it a clean

Originally Posted by Bazzle218

I do not wish to put a hex on you, but last month my taco did the same a number of times and then died. No warning lights on the dash but after checking connections and finding all ok, threw on a muliti meter and found Alternator had dropped its bundle. Confirmed at Auto elec, Alt dead $320 later taco works. Godo luck might also be the spade terminal at the back of the alternator. Give it a clean

Taco?

Originally Posted by woollyfree

Never thought of the alternator, thanks I'll have a look.

Pull the tacho feed wire off the alternator and give it a nip down with long nose pliers, re attach feed wire and it should be fine- mines been fine for 3 years.

Originally Posted by woollyfree

Never thought of the alternator, thanks I'll have a look.

Exact same symptoms as you, mostly fine, would occasionally just drop, everything else was fine. Turned out to be the wire to the back of the alternator as others have suggested. Mine fell apart as soon as I touched it, put a new female blade type attachment end on it, hasn't been an issue since (almost 12 months).

Seano

Well it gradually got worse so I decided to have a go at the alternator connection. It looked OK, but with electricity you never know. Replaced it, full of hope, started it up and went for a drive.
Exactly the same as before.

so it looks like an alternator strip down to repair it. But as it's an auto, I'm not going to worry about it just yet.

My spade term was getting hot from the nearby exhaust, thus easing the crimp pressure and letting the wire go.

Changed brand of crimp terminal. Much better, but still problems.
What rocking motion of motor there was, was fracturing the strands at the back of the crimp.

Had to change wire type and secure it to feeds to nearby d'light, hi beam, lo beam relays, for stability. Used silicon (high temp) insulated type - very flexible. Spliced it back to the original installed wire back near the heater air intake.

'luck,
Rovers4