Dillinger1977
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| posted on 16/3/06 at 08:50 PM |
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idiot tail lights question
hi all. forgive the noob question, im new to this lark. 
for the rear lights on my car i have 4 connectors on my loom:
-earth
-side lights
-brake lights
-indicators
and i have seperate brake and indicator lights with the following
brake:
-earth
-side
-brake
indicators:
-earth
-indicators
now since theres 5 wires there to go into 4 i assumed that you can wire the 2 earths together into a shared one (wrongly?)
ive tried this and cant get the indicators to come on at all when hazards are on, and when i short the brake pressure switch one of the brake lights
is very bright, one is dim, and for some unknown reason the 2 indicators are on very dim too.
is there another way i should be wiring them up?
also, my r1 fuel pump doesnt make a noise if i wire it to the battery, have i blown it up?
i hate this electrics stuff.
-Rog
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RazMan
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| posted on 16/3/06 at 08:54 PM |
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Sounds like you've got an earth problem or two of the side/ brake wires crossed.
You are right in assuming all the earths are commoned, as are the two side light (three including the number plate) & brake feeds. Are the earths
all connected to the loom earth or the chassis?
[Edited on 16-3-06 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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shortie
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| posted on 16/3/06 at 08:57 PM |
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Does sound like an earth problem, is the battery negative well connected to the chassis?
All earth's for each side of the rear lights can go to one point.
If you literally connect the pump to the + and - of the battery does anything happen?
Also, how are you fixing the earths to the chassis??
Rich.
[Edited on 16/3/06 by shortie]
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Ian D
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| posted on 16/3/06 at 09:10 PM |
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Its almost certainly an earthing problem with poor grounding the most likely cause. Suggest you take you earth feeds and temporarily strap them to the
batter earthg terminal. Se what happens then.
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Dillinger1977
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| posted on 16/3/06 at 09:37 PM |
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all the wires are connected to the loom earth which is in turn connected to the chassis at the rear of the car.
connecting a temporary wire from the light earth all the way to the battery -ve made them work straight away, so i definately have some sort of
earthing issue.
(thanks for the suggestions!)
i ground down some powdercoating before connecting a spade terminal by a nut+bolt through the chassis, i'll try doing that a bit better.
as for the fuel pump, when i first got it i connected it directly to the battery very quickly and it made a vibrating noise. now it doesnt make any
noise and heats the wire up. i think it might be dead!
-Rog
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shortie
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| posted on 16/3/06 at 09:49 PM |
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Pump could be dead, is it carbed?? or fuel injection?
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Dillinger1977
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| posted on 16/3/06 at 09:53 PM |
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carbed version (5jj)
-Rog
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smart51
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| posted on 16/3/06 at 10:04 PM |
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The stop tail light design is a bit poor - it allows you to put the bulb in either way round. The brake light that is dim is actually lighting up the
tail light fillament. Take the bulb out, rotate through 180 degrees, reinsert.
You can wire the earths together for the stop/tail and indicator bulbs. They, together with the fuel pump, have their earth routed to the chassis
rather than to the battery. For the sake of 2 metres of black wire to linkl it up directly to the battery rather than to the chassis, I think this is
a bit poor. Get a length of wire and link the rear earthing point straight to the battery. If it works then your earthing is bad. You have got the
front of the loom connected to the chassis haven't you? The -ve feed to the starter motor should be good enough.
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02GF74
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| posted on 17/3/06 at 11:22 AM |
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quote:
Originally posted by
for the rear lights on my car i have 4 connectors on my loom:
-earth
-side lights
-brake lights
-indicators
don't understand how there can be one wire for indicators; there has to be two, one for left and one for right side surely?
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Dillinger1977
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| posted on 17/3/06 at 12:05 PM |
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sorry yes, that was connection -per side-. 
-Rog
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