Mud-club

Vehicle & Technical => Discovery => Topic started by: Tig on May 13, 2006, 00:56:43

Title: Tachometer on 300 TDI 1995 Disco
Post by: Tig on May 13, 2006, 00:56:43

Mine keeps flicking up and down (even at a constant speed) any ideas anyone?
I dont know where the tacho takes it's feed from so I'm a bit stuck.

Title: Re: Tachometer on 300 TDI 1995 Disco
Post by: gords on May 13, 2006, 01:15:18

Quote from: "Tig"

I dont know where the tacho takes it's feed from so I'm a bit stuck.

It connects to the alternator - check all the wires / connectors are tight.

Title: Tachometer on 300 TDI 1995 Disco
Post by: Budgie on May 13, 2006, 09:32:21

This is a common fault with the 300Tdi and as Gords said the problem is normally with the connection at the rear of the alternator.

It's either a white wire or black/white wire onto a spade connector, these connectors are not very good and you can either replace it with a new one (which for me has cured the problem for the last 5 years) or clear up the connection and try to make it tight again by crimping the spade connector a little.  :wink:

Title: Tachometer on 300 TDI 1995 Disco
Post by: Tig on May 17, 2006, 17:33:06

Spot on! Thanks lads  :D

Title: Tachometer on 300 TDI 1995 Disco
Post by: Budgie on May 17, 2006, 17:35:35

Glad we could help Tig.  :D

Title: Tachometer on 300 TDI 1995 Disco
Post by: kwik.kwak on May 17, 2006, 17:59:42

my  rev counter has packed up altogether, will it be the same problem ????

Title: Tachometer on 300 TDI 1995 Disco
Post by: Budgie on May 18, 2006, 12:57:21

It's worth checking it.
Find the wire described above, see if it is loose on the connection onto the back of the alternator and pull it on & off a few time, then replace it and start the engine. If there are signs of life from the tacho then try replacing the connector on the wire.

The cost of one female spade connector is much better than a new tacho!!  :wink: