Hello, O.K. so customer said he shorted wires at # IV relay to check power windows and realized its not right one when smoke came out. Car was running fine before this . Now car will start . Injectors with noid do nothing . I have voltage to them unplugged . Have pulse at coil. I replaced ECU with my good one , replaced Fuel Injection Relay no difference , jumper relay nothing . I have no fuel pump or injector pulse . Pulled relay panel , fixed a pulled terminal wire just not related to this problem .I can not find what the IV relay gets its power from since it says in diagram unused . I think this is what's causing problem. He said he power to it before . Any help with be great .

 

I wonder if he shorted his alarm system? Let me look...or probably someone will have an answer in a second anyway...

 

OK, I saw in the diagrams that the alarm seems to be an option. And if installed there will be a simple relay in the IV position. It's hard to know what happened without knowing what he shorted. (assuming 30 & 87) Not sure how the "smoke got out", again not knowing what he put where.
But, the wire from 87 is to plug "z" pin 1. That leads to the alarm module which has 2 functions...sounding that stupid horn...and keeping the engine from starting.

May not be related though, unless the alarm cuts the fuel pump. I see it has a couple of relays, one to the horn and another, I'll look at when I get home.

I'm not in a position right this second to look any deeper, but if you have a diagram with the alarm unit, that's the one to use. If you're looking at the CE page, there may be a "page 2" with the right drawings on it.

OK a quick edit, the second relay in the alarm is normally closed, and pulled open by an event, so may not be related unless it got a jolt that fied the alarm box sending that relay open anytime ya tried to apply power...just a thought.

gotta get to the home depot before they close, I'll look in later if the elders haven't already told ya what's wrong.

 

best thing to do is take a picture of the front and then drop the CE panel and take a picture of the back and post them here.

When you examine the rear of the CE panel you will be looking for gray wires that have a satin finish to them these will be the wires that got hot.

NOTE hunting around without assessing the damage might release more Lucas smoke, and once its out you cant put it back in

 

Lucas!? I thought I was done with all that when I quit the British Leyland cars.

As MrMerlin said, a picture, maybe with relay out to see if there is a burned connector slot to help see "where the smoke came from".

and...in just trying to help understand the system here, I would offer that the alarm module is said to be just a few inches away from the CE panel and the maintenance manual says this:

Note
A defect in the (alarm) control unit could cause failure of the
ignition or fuel pump under certain circumstances,
even when the alarm system is not activated.
If a new control unit were not immediately available
in this case, the following measure will provide help.
Pull off plug Z on central electric board and bridge
terminals 1 and 6 on central electric plug.
This will stop function of the alarm system.

 

The Prince of Darkness is nefarious, and often hides in unlikely places...

 

Didn't have relay in alarm slot . I don't have power at 30 or 86 . What powers up that relay IV will fix it . He said he shorted for a few seconds and only small amount of smoke . Wires look find , connectors look fine. Hey Merlin there all frickin gray .

 

Roger gray wires please reread what i wrote.


you will be looking for gray wires that have a SATIN finish to them,
these will be the wires that got hot.

Its really easy to see the difference between the wire that have not gotten hot VS the wires that have ,
and yes they are all gray wires on the back of the CE panel

 

Hey Merlin not being smarta** just don't understand why they wouldn't use different color wires for different circuits. Must have had a sale on gray wire !!

 

Ahh OK I understand...the wires on the back of the CE panel are jumper wires meant to carry power to other parts of the board.

Since the rear isnt easily seen it doesnt make sense to use different colors for this part of the circuit.