Mr Grunts Heater Timer/Interlock

Anyone got a circuit diagram of the heater/starter circuit on Mr Grunts motor?

Seasy, big fat wire comes from fuse box to ign switch, big fat wire goes from ign switch to glow plugs.

yu got a 2.25 or 2.5 doozil, Grunt?

2.5 turbo. 1989.

Acshully the fost big fat wire comes straight from the starter motor to the ign switch according to Haynes, and goes to the ign switch to the fuse box

I need the colours of the following wires...

From ignition switch to heaters.
From live side of starter button.

circuit i got dont show a seperate starter button!

Dunno if the start button is standard, looking at the ignition switch gubbins I think it probly is, or was something a previous owner sorted.

Hang on.

Ign switch to heaters is brown with a red tracer.
Live from starter button is white with a red chaser. This goes to a relay in the fuse box.

have a look at these options.

option one times the heater.
option two times the heater and interlocks the starter, so that you cant start the engine with the timer running.

wodga fink?

Gorra doosul maunual fer that motor if it's any help?

ta Marcus - but think this is the stuff?

Yer gonna have to explain it a bit, is the right hand lump the timer, wots the left hand relay doing?

Option one would be the one I reckon, so on reely cold days the injun could be started after one and a half heats with the last half heat being a post heat, if you get my drift.

reet then, Grunt.
pic 2 -
12v and ground shd need no explanation.
on lh side of drwg,
top brown wire (to Rly1/86) is the heater live from the ignition switch.
bottom brown wire(from rly2/87a) is timed feed back to heater circuit.
top red/white (dotted wire) (to Rly2/30) is feed from start button.
bottom red/white wire from Rly2/87) is feed back to starter button.

so....
1) operate heater key position.
2) this energises relay1 and grounds pin 1 of timer, thereby starting 10 sec timer.
3) pin 5 on timer is then grounded for 10 secs (energising relay2).
4) this switches the feed from the starter button to the heater circuit and disables the start button.
after 10 secs relay2 reverts back to normal mode and switches volts from the heater circuit back to starter button.

ok?

pic1 does not have the start button interlock.

needs 2 relays as timer is ground triggered - not volt triggered (if yu know wot i mean)

I am sure this aint an elegant solution, but its easy to do - and if yu use relay sockets, easy to fix if a prob occurs.

Reet goddit, the only prob is that the starter button operates a relay so the actual starter button wires aren't fat enough for the the heater plugs.

The timer must have two lives into it one switched and one permanant? Is that correct?

yup - see attached, although pin 5 aint a switched live - its the load - normally a light, but in this case a relay coil..

yu cud, as the starter button live is live when ignition is on - use that for the 12V supply, if you were using the interlock version.

Reet then if 86 on relay 1 and 87 on relay 2 both came from the existing glow plug wire to the ign switch and 30 on relay 2 went to the plugs, That ud do it wunt it?

as has just been pointed out to me - I havent made provision for it being pink - but I am sure that could be arranged as an optional extra.

refer to pic1 - it is easier