Thread: Terminated Tacho

Your tacho runs off the alternator .... So Your alternator is dead and so is the Tacho




That photo is of a aftermarket - home made - something / looks like a block of, resistors? taped together

Where do all the wires go?

Ah, well someone somewhere was thinking... if the same alternator / tacho is used for both diesels and petrol engings.

Reckon you may be correct, went outside again to see if the HT wires were lighting up where they ought not... and noticed a growling moaning sound, which seemed to come from the alternator. Put my hand on it and it felt "rough".

Double b%##^r, as a Jap alternator would have been the ideal replacement.. But many Jap diesels use the IP for tacho pick-up.

How many banks must I rob to pay for a replacement? Any aftermarket Chinese ones around ? (surely they'd last longer than Lucas!)

Dunno what those things are... too lazy and late to dig out the multimeter...

Switched-off James In Perth

Originally Posted by superquag

How many banks must I rob to pay for a replacement? Any aftermarket Chinese ones around ? (surely they'd last longer than Lucas!)

This link will help .... Dunno which side of the river you live on tho ...

Alternator / Starter motor rewinds

A search on threads started by LOVEMYRANGIE ... (AKA Andrew) ... will reveal that a Massey Ferguson will fit .... 120 AMPs

The Quoka may reveal some available on early V belt Discos for wrecking

.. but a glass of red helps things along (on prescription)...

From a corrugated wiring loom from somewhere under the dizzy,I think... terminates in 5 wires.

White with green stripe goes to the coil No 15 termainal, which also piggybacks to the IGN module and to a capacitor to earth.

Then there are two white with black stripes that plug into these 'things' .

One white / black also joins off and connects to coil No 1 terminal. Both also plug into one of these thingies.... coming out the other end as a white with blue stripe which also vanishes back into the loom.

The other white / black goes throught the other thingie and becomes a white / dark blue stripe...and vanishes back into the loom.

These thingies have a dc resistance both ways of 6.9K Ohm. They are also a LUCAS 953066 on one side, and the pic numbers of the other.

James in Perth

Live in Gosnells... Just up the road and round the bend (or three) from ROVEAIR, EAS and ABS specialist.

Just got used to using J in Perth for the international B/Board I was last active on.

James in Gosnells

Hi the thingies are resistors in the line to the ECU. This is how the ECU gets its timing signal. So if your ignition fails your injection stops instantly. No modern muck like a crank sensor on this car. The resistor block is usually taped out of the way somewhere, maybe this was a Monday car.

The alternator on vee belt models is easily replaced by a common or garden variety Bosch alternator. The tach output is just a simple tapping to one of the three stator winding connections. The XE/XF Falcon alternator came with this tapping already fitted for the auto choke connection. They can be upgraded to 120 amp maximum.

On the serpentine belt model the alternator is different and I haven't studied a replacement. The tach pick-up is the same though, any alternator you can find to fit will need opening up and a wire soldered to a stator point and terminated outside.

Tach feed wire is the small wire on the alternator back that is white/grey stripe from memory.

Bee utey,

Naturally, mine is a 'serpentine belt' model... 7PK belt.

Don't know what brand it is, but these pics will tell the Knowing Ones !

Personally, I suspect the EAS pump had done the damage.... bought it as 'not working', had it overhauled (DON'T a$k) and now that its working again...placed too much load on an already over-taxed alternator... seeing as 2 EAS pumps had died beforehand of non-sealing valves...

Yes, the two Thingies they were taped up and tucked down out of sight... it was the insulation tape that made me look twice, just seemed like an 'add-on', so I pulled it apart and measured them, 6.9 k each.

At the moment I'm inclined to get another alternator from a LR wreckers, seeing as I can't really afford to be immobile for more than a day or two...

145,000km is not really inspiring as far as Alternator life-times go.

Shortest service life I've experienced so far would be closer to 250K (Nippon Denso)

Off the topic a bit, will be curious as to what TATA does with the electrics...maybe replace with "Another" brand...

James in Perth

Personally, I suspect the EAS pump had done the damage.... bought it as 'not working',

Ah, the wonders of Lucas, who was later renamed Magneti Marelli to hide his true evil.
In my experienc eyou are lucky to have it last that long. Mine lasted 80KK, and I replaced with a Bosch on my V belt.

I think that the poms just underspecify for the loads in OZ, eg my 92 Vogue had a 60Amp when a Magna had an 85amp Bosch. I think that they always struggled with air on on hot days in traffic etc.
If you are handy and seeing you have a ribbed belt, perhaps try to adapt a Bosch 120amp from a Falcon or similar.
Regards Philip A