1993 coaster wiring
Submitted: Monday, Mar 25, 2024 at 21:02
ThreadID: 147336
Views:1055
Replies:8
FollowUps:9
Oliver B1
Hi there I have a 93 coaster and half way through travelling.it has lost all reds , it still fires but can’t get reds on . I have by pass the ign fuse to try start it. Reds came on but bus won’t start like it’s not receiving diesel , have checked all fuses including fuseable ones but no help , wondering if anyone has wiring diagram to chase the wire to see if damaged or any other input would be great
Reply By: RMD - Monday, Mar 25, 2024 at 21:18
Monday, Mar 25, 2024 at 21:18
Oliver.
I am a bit confused with what you said. You said "it still fires" does that mean it runs the engine?
If you bypassed the ign fuse and RED lights appeared then it seems to be the one which is blown for some reason, possibly shorted wire and blown the fuse. Then you said "it won't start"!
So, does it start and run or does it NOT start and run, can't be both.
I would look for chaffed wiring shorting to earth, especially if loom wires run over/past moving parts like engine case, steering etc.
The fuses are to PROTECT the wiring so they should not be burnt or melted. Bypassing may light up more than the dash board if you don't have a fuse to limit/cut current being applied.
If fuses ARE OK also look for loose or dirty loom plugs which often become corroded inside and unseen until pulled apart for inspection and possible cleaning.
AnswerID:
645545
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 07:38
Tuesday, Mar 26, 2024 at 07:38
Sorry about that , it cranks but won’t start I’m guessing with out the reds to signal diesel pump etc . I ran a wire with fuse linked into it and plugged it into ignition fuse . By doing this I gained reds back on dash but still won’t start so wondering if wiring linked to that ignition fuse is linked to another not allowing diesel to start it . I will
check over loom plugs and chaffed wiring now , thanks for your help
FollowupID:
925836
Reply By: Mikee5 - Monday, Mar 25, 2024 at 21:33
Monday, Mar 25, 2024 at 21:33
Do you mean ‘revs’? You may be an overseas visitor? Just a bold assumption. If so you might have a blocked fuel filter or a damaged fuel hose.
AnswerID:
645546
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 07:40
Tuesday, Mar 26, 2024 at 07:40
Reds , red lights, dash lights sorry for confusion far from a knowledgeable car person
FollowupID:
925837
Follow Up By: RMD - Tuesday, Mar 26, 2024 at 08:31
Tuesday, Mar 26, 2024 at 08:31
Mikkee
Not having REDS means No REDs, ie, on the dash. So no alt running or oil pressure. Needs to have power to them to begin anything.
FollowupID:
925839
Reply By: Member - McLaren3030 - Tuesday, Mar 26, 2024 at 07:32
Tuesday, Mar 26, 2024 at 07:32
Hi Oliver,
I really think you need an on site Auto. Electrician to problem solve this. Too many things that can go wrong and cause a fire with this one.
Macca.
AnswerID:
645547
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 07:42
Tuesday, Mar 26, 2024 at 07:42
Thanks Macca all auto electricians are 6-8 weeks within 100km of me
FollowupID:
925838
Follow Up By: Member - McLaren3030 - Wednesday, Mar 27, 2024 at 07:10
Wednesday, Mar 27, 2024 at 07:10
Hi Oliver,
May be so, but as you have already stated in another response, you are “not a knowledgeable car person”, it is not wise to “tinker” with something that you have little knowledge about. Particularly something that might actually further damage the electrical wiring loom. A friend of
mine through he knew what he was doing when he tried to jump start his motorcycle from another battery, ended up “frying” the whole wiring loom when he inadvertently touched the frame with the positive cable clamp. How long would it take to replace the wiring loom on your Coaster? That is of course if you can get another one.
Macca.
FollowupID:
925847
Reply By: RMD - Tuesday, Mar 26, 2024 at 08:34
Tuesday, Mar 26, 2024 at 08:34
If you find the wire going to the injector pump and ensure it is fed 12v it should then allow fuel through the pump so when it cranks it will start. Given the glow plugs may also be required if cold.
AnswerID:
645548
Reply By: axle - Tuesday, Mar 26, 2024 at 11:12
Tuesday, Mar 26, 2024 at 11:12
G/Day Oliver,
I would
check what fuel is coming out of the pump when turning it over.
As RMD says could be a issue with wiring to the pump, or cut off solenoid.
Cheers Axle
AnswerID:
645549
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 20:28
Tuesday, Mar 26, 2024 at 20:28
Thanks axle definitely the main issues I’m checking now appreciate your help great having people share help around
FollowupID:
925840
Reply By: Member - FSH00 - Tuesday, Mar 26, 2024 at 18:21
Tuesday, Mar 26, 2024 at 18:21
There was a post same as this on the modified 80 series facebook page or the 1hz facebook page they hade it solved in no time, as above it was chafed wires in engine bay, Try posting on there, will see if I can find it.
AnswerID:
645555
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 20:29
Tuesday, Mar 26, 2024 at 20:29
Thanks a lot I will have a look now appreciate the help you have giving me
FollowupID:
925841
Reply By: IvanTheTerrible - Tuesday, Mar 26, 2024 at 20:23
Tuesday, Mar 26, 2024 at 20:23
Some Japanese commercial vehicles have two power feeds to the ignition switch which are fed from two fuseable links off the battery. You may have damaged one
AnswerID:
645558
Follow Up By: Oliver B1 - Tuesday, Mar 26, 2024 at 20:31
Tuesday, Mar 26, 2024 at 20:31
Hi Ivan I did notice there was two and
check o think I didn’t know there was 2 for the 2 thanks a lot for your knowledge
FollowupID:
925842
Follow Up By: RMD - Tuesday, Mar 26, 2024 at 21:48
Tuesday, Mar 26, 2024 at 21:48
A FUSIBLE LINK can look perfect but fractured inside and NOT connecting. If you have the gear or
test light,
check at the vehicle end of each fusible link you find to see if there is voltage there!
Trying to stretch them they slowly get longer! which is bad.
FollowupID:
925843
Reply By: Andrew L - Wednesday, Mar 27, 2024 at 20:46
Wednesday, Mar 27, 2024 at 20:46
The alt reg supplies earth to those reds.... if they are getting power, you need a new reg. if they are not, you may need an ignition switch
AnswerID:
645561