fronnt sidelight/indicator

haven't tried the tail lights as I don't have a bulb for them yet (waiting to hear about that workshop manual from the club) its the front sidelights im trying to get going at the moment. then ill work my way round.

many thanks
coop
 
cooper1203 said:
haven't tried the tail lights as I don't have a bulb for them yet (waiting to hear about that workshop manual from the club) its the front sidelights im trying to get going at the moment. then ill work my way round.

many thanks
coop
Click to expand...

Tail lights are standard 12v 21/5w bulbs. The number is 380
 
cooper1203 said:
are the wires into and out of the fuse box on bullet connectors if not how does one disconnect them?
Click to expand...

The ends of the wires have half of the fuse retainer soldered to them. They have a small lip on them that needs to be depressed to push them out of the box itself.
 
ok front nearside works. as to the offside... someone needs to explain the laws of physics to it. I get 12 volts on the fuse. I get 12 volts on the light end of the wire from the fuse if I use a ground on the chassis. I get good continuity between the earth wire and the body ground and good continuity between the wire lamp end and fuse end. I thought great it works plugged in the working bulb and holder nothing.. put a volt meter across the positive and earth and back to 0.15 volts!!!!!!!!!!!!!!!!!

many thanks
coop
 
cooper1203 said:
ok front nearside works. as to the offside... someone needs to explain the laws of physics to it. I get 12 volts on the fuse. I get 12 volts on the light end of the wire from the fuse if I use a ground on the chassis. I get good continuity between the earth wire and the body ground and good continuity between the wire lamp end and fuse end. I thought great it works plugged in the working bulb and holder nothing.. put a volt meter across the positive and earth and back to 0.15 volts!!!!!!!!!!!!!!!!!

many thanks
coop
Click to expand...
You can get a reading of 12 volts with no load, when you have bad joints /earthing. As soon as the load is applied the voltage drops to next to nothing. You need to recheck all your connections again I'm afraid.

When you say you have good continuity, have you checked it right back to the battery, after all that is your power source. If you use the Ohms range on your meter, check between the positive side of the battery, and the point where you would expect to see 12V on the bulb holder. You should read close to zero Ohms. Then do the same between the battery Earth and the earth point on the bulb holder, again you should get close to a reading of zero ohms. If you don't then check the connection path from battery to bulb holder until you get a change in the reading. My money is on a dodgy Earth somewhere between the two :? after all even Mr Scott couldn't change the laws of Physics :shock: :shock: :shock:
 
Hi, instead of using a meter use a bulb. I use a 21w bulb in a bulbholder with two fly leads,
this introduces a load and shows up bad connections by the bulb not glowing very brightly.

Colin
 
ok where is the connection from the front engine wiring harness to the main body harness??

it is the only place I haven't tried to see if anything is wrong.

many thanks
coop
 
cooper1203 said:
ok where is the connection from the front engine wiring harness to the main body harness??

it is the only place I haven't tried to see if anything is wrong.

many thanks
coop
Click to expand...
On my 1972 3500S, the three wires for the sidelight and indicator come out of the front of the engine bay loom. Looking at a picture of the loom from the Parts Catalogue it looks as though they would go directly to the fuses with no further connections.

frontloom2.jpg


This seems to be borne out by the Circuit Diagram as well, which only shows a single connector between the bulb and the fuse. Item 7 is LH side light to fuse 44, and item 14 is RH side light to fuse 43. There is a second connector on the RH side, but according to the diagram the wires for the front sidelight go on the same side of the connector, but still worth checking. I have no idea where this connector is, but since it feeds the RH tail lamp, my guess would be somewhere around the dash area, where a multi-connector would be accessible.

lightfuses.jpg


The earth connection on mine is a bullet connection which goes into a three-way connector like this.

bullet3.jpg


On mine, this connector has two Earth feed wires, and earth connections for both headlights, one for fog, one for horn, and one for side lights/indicators, so plenty of opportunity for faults :shock:
 
That's right the loom inside the car and engine bay is all one loom. The only part that is separate
is the harness that goes to the rear and that plugs into the main loom at the base of the 'A' post.

Colin
 
ok is the connector with in the black insulation wrapped round the harness? all I can see at the bottom of the apost is one cable that is bolted to the floor below the pedals and a second cable that disappears into the sill frame.
many thanks
coop
 
Hi, the big cable "bolted to the floor" is the the main battery cable and connected to an insulated
terminal that goes through the floor, the other side another big cable continues to the starter
motor. If you are thinking of fiddling with that then disconnect the battery!! The wiring harness
that goes to the back is the bundle of wires wrapped in black insulation and the connector plug
is in the 'A' post. There is quite a bit of slack in this so either pull it down or push it up because
the cable routing is into the post about halfway up and out the bottom.

Colin
 
does anyone have a pic of how the wire comes out the fuse box as I am being blind / stupid and cant see the bit u depress harveyp6 said about.

many thanks
coop
 
colnerov said:
Hi, the big cable "bolted to the floor" is the the main battery cable and connected to an insulated
terminal that goes through the floor, the other side another big cable continues to the starter
motor. If you are thinking of fiddling with that then disconnect the battery!! The wiring harness
that goes to the back is the bundle of wires wrapped in black insulation and the connector plug
is in the 'A' post. There is quite a bit of slack in this so either pull it down or push it up because
the cable routing is into the post about halfway up and out the bottom.

Colin
Click to expand...
is it a multi plug or is each wire plugged individually as I have all other lights working (as far as I can see by the light on the walls or on the toolbox).

many thanks
coop
 
Just re-read the thread and you don't mention if the front indicators work or not. If they are, that would tend to suggest that the earth is OK, so narrows down the possible culprits :)

I'm not sure of whether the loom has individual connections or a multi-plug, but the latter would make more sense to me :shock:

Any news on the tail lights? If they work then you must have a good 12v supply at the connection you are looking for :)
 
all lights work other than the front and rear offside side lights. the loom in the a pillar only pulls out about 6 inches and no sign of a plug of any description.

I checked the earth from the battery to the front sidelight earth and got a dead short.

if I could get the wire off the fuse holder I would simply replace it and just run it alongside the loom however in the back of my mind I cant help wondering if a previous owner has unplugged it for some reason and forgotten to plug it back in. As there r lots of things that are half done.

many thanks
coop
 
Hi, I have just been out and looked at mine because it has been a while since I have done so.
The loom from the back goes in at the base of the 'A' post and comes out again just behind
the dash by the HRW switch. It is a multi plug and is just tucked in the post there.

The connections to the fuse box are part of the clip that holds the fuse if some one has pulled
it out the fuse wont be touching it and so won't make a connection. Be careful the fusebox is
a bit of a weak spot on the P6.

Colin
 
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