Technical wizard help needed ( electrics)

Hi
I've been ( slowly) rebuilding a 90, after converting from a van to a cab type, and basically taking on a lot of improvements along the way.
The biggest issue i have had was with the electrics as the loom was a real mess of DIY by previous owner(s). So out came the split charger, central console and winch circuit and a mile of 2.5mm green and yellow earth cable which was not being used as earth!!!
After getting a new loom from front to rear and all between from Autosparks i am now in a position where everything is working other than the rear offside indicator when using the turn switch.
All the indicators work when using the hazzard switch so the lamps are ok.
The front indicator lamp works on right turn just not the rear!!!
I have run a direct earth to the lamp so it is not that.
any ideas as i am pulling my hair out in lumps? Could it be that the brand new chassis loom from Autosparks is defective on that circuit?? or something else?

Any thoughts or suggestions would be welcomed

thanks

is it flashing double speed?

The hazard switch over-rides so the lamps must be fine. What condition is the stalk in?

Must admit my old stalks were crap i rebuilt them to save pennies but i got a cheap set for £20 and its so much better

Meter out the feed to your indicator.

Could be a break in the loom!

suspect hazard switch.

check the relay I recently had

No Dash lamps at all.
No rear lights
No brake lights
No number plate lights

The cause was a dodgy connection on the flasher relay.

SteNova said:

is it flashing double speed?

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Nope all flashing same speed by hazzard switch and only three by stalk switch!!!

bluehaze said:

The hazard switch over-rides so the lamps must be fine. What condition is the stalk in?

Click to expand...

if the front right side ind lamp works then would this not indicate the stalk switch is ok?

Oldseadog said:

Meter out the feed to your indicator.

Could be a break in the loom!

Click to expand...

i dont think it can be the loom otherwise the lamp would not flash when using the hazzard switch!!! or is this a different circuit?

nrgserv said:

suspect hazard switch.

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hi

cant be the hazzard switch if they all work using it ....or can it??

not sure how that circuit works!!

Pikey said:

check the relay I recently had

No Dash lamps at all.
No rear lights
No brake lights
No number plate lights

The cause was a dodgy connection on the flasher relay.

Click to expand...

Will have a look at the relay but this is a new one from RDX for LED lamps!! I would be more inclined to suspect the loom as every other electrical light and lamp are working ( even the rear indicator when using the hazzard switch instead of the stalk switch ).

UPDATE -

I'll be going back over to work on the 90 today and will be going through all your ideas etc, thanks for all the input guys,
The 90 is based down in Fareham Hampshire if anyone is close by for assistance?? Beer tokens etc!!!

cheers
Kev

I may be wrong, wont be the first time , LOL

but I thought LED's had to have the positive and negative wired only one way.

Is it possible you have the feed correct from the hazards, but you have it incorrect from the stalk to the relay input for the indicators.Not sure how yours is set up and I do not have a wiring diagram here atm.. Assuming they have different inputs into the hazard relay.

I would also try swapping the left and right outputs from the relay to see if you can get the prob to swap from left to right. If it moves at least it would show your wiring is good. and the problem is at or before your relay.

Cheers

Neil

Of course could be I am completely wrong.

take the led off and start with a bulb

HI Again,

Just looking at an old Haynes manual for the wiring , unfortunately only one I have at hand is up to 95 MY,

it shows output from Hazard relay on hazards has 2 outputs , one to LH and one to RH.
which you say appears to be OK.
Ind stalk comes after the hazard relay , and looks like it joins the wiring for whichever side you want to light up.
Is it possible you have forgotten , or got a broken wire at the point the hazard relay wires and the indicator wires meet?

If the lamp works on the hazard, then the loom to the rear is ok.
IIRC, the wiring from the indicator switch goes to the hazard switch, which switches the power from the indicator through when in the off position.
The Hazard switch is the usual culprit in these things, as it has multiple contacts that wear and get gunged up. Pull it out, connect the indicator output direct to the rear loom/lamp and test again to confirm. Sometimes a liberal dose of WD40 is enough to clean the contacts.

zeaphod said:

If the lamp works on the hazard, then the loom to the rear is ok.
IIRC, the wiring from the indicator switch goes to the hazard switch, which switches the power from the indicator through when in the off position.
The Hazard switch is the usual culprit in these things, as it has multiple contacts that wear and get gunged up. Pull it out, connect the indicator output direct to the rear loom/lamp and test again to confirm. Sometimes a liberal dose of WD40 is enough to clean the contacts.

Click to expand...

+1
but I didn't have time to write al that, cheers

Thanks for all the ideas guys, much appreciated.

It certainly looks as if the hazard &/or relay is going to be the culprit.

I've got a friend who is an auto-elec coming round on saturday for a look if i have not sorted it by then!!!

cheers
Kev

I'd say it will probably be stalk.

Basically there is a flasher, it can flash the 3 on one side + a trailer or all 6 + a trailer. The hazard switch routes the circuit depending on what position it is in.

In normal operation it takes a feed (green I think) from the hazard switch, via the flasher relay, then out onto the turn signal stalk and out to the respective circuit, when the circuit is made, the flasher starts to flash.

On hazard mode the switch disconnects the green feed (ign only) to the flasher, connects a permanent feed (purple) routes it through the flasher relay on a light green wire, back into the switch crowbars the NS and OS circuits together and sends them out to the lamps - again the flasher starts to do it's thing.

There is one relay involved - if it works on hazard then the problem is either circuit routing on the stalk or the switch is shot.