Older vans/trucks

[eggsarascal]

Got an electrical problem on the old girl, fecker wont start. I put a new battery on it last week, there are two, 24v, it started first time, switched it off and now it won't start. It's an ex Snap-on truck so was modded from new, turning the ignition off doesn't stop the engine (this I'm told was done so the driver could get out lock the door and leave the engine running), you have to hit the kill switch to stop the engine ,there is also an isolator switch to isolate the batteries, to stop the tacho draining the batteries when parked up for a while. Which leads me to think it's the ignition switch itself), before I start ripping the dash apart any ideas?, bill pierce? John p, anyone?

 

Just to add I've tested the kill switch, and isolator with a meter, they are both working.

Edited May 19, 2020 by eggsarascal

[billpierce]

Got an electrical problem on the old girl, fecker wont start. I put a new battery on it last week, there are two, 24v, it started first time, switched it off and now it won't start. It's an ex Snap-on truck so was modded from new, turning the ignition off doesn't stop the engine (this I'm told was done so the driver could get out lock the door and leave the engine running), you have to hit the kill switch to stop the engine ,there is also an isolator switch to isolate the batteries, to stop the tacho draining the batteries when parked up for a while. Which leads me to think it's the ignition switch itself), before I start ripping the dash apart any ideas?, bill pierce? John p, anyone?
 
Just to add I've tested the kill switch, and isolator with a meter, they are both working.

Check your power to starter motor and starter earth. I would run a 24v jump cable from yer batteries to it for pos and clip to good clean earth on chassis for neg. Do it one at a time, so you can identify which if any is faulty.

Has something drained your new batteries? Or are they fully charged?

[eggsarascal]

42 minutes ago, billpierce said:

Check your power to starter motor and starter earth. I would run a 24v jump cable from yer batteries to it for pos and clip to good clean earth on chassis for neg. Do it one at a time, so you can identify which if any is faulty.

Has something drained your new batteries? Or are they fully charged?

Cheers Bill, new battery's been drained. The bit I cant get my head round is the isolater had been turn on, so I don't understand where I'm loosing it. I know it's working because the light on the tacho is off.

[AHPP]

Starter motor relay trigger circuit rigged to always be on, engaging the magnet in the relay? That would make sense if a second switch starts it.

[eggsarascal]

12 minutes ago, AHPP said:

Starter motor relay trigger circuit rigged to always be on, engaging the magnet in the relay? That would make sense if a second switch starts it.

Good shout, started it with new batteries. relay fired then jammed. I'll give it a look tomorrow.

[Khriss]

On 04/05/2018 at 18:30, Stubby said:

Being  1988 it will not be affected by the new MOT rules for diesels I presume ...so worth a punt  I would have thought Eggs mate .

Dont think this man too bothered abt all that nonsense...... 

Edited May 23, 2020 by Khriss
Notice my climbing gear behind in blue box on sack barrow..... Age @Stubby tha knoes.... ?

[Khriss]

Cracking VW split screen, nice old chap with dog.  All the boxes, chains n carved wood n ironwork you need - fucking work of art really.  K