kieran_macca

iTrader: (2)

hello, wondering if any of the electrical wizards on here can tell me which earths are for which auxillary components (blower,etc.), hopefully that makes sense. And does the earth to the engine, if disconected, cause anything to stop working(no earth)?
The car in question is a full ghia model and has therefore all electrics, most of the electrics are working except a few things.
Thanks for any help, if you can make sense of that

COLEYST200

iTrader: (3)

the motor needs a very good earth

tabetha

A lot of the earths are linked, there is a earth next to the fan blower as well.
The problem many suffer from is the wire inside the insulation actually rots causing major high resistance, items will then try to find a earth circuit through other items earths, a classic example being the rear lights which can go "disco" with a bad earth.
You could very well have more than just one bad earth, any electrical motor is VERY voltage sensitive so will show problems sooner than other things.
What precisely is the problem ?
tabetha

kieran_macca

iTrader: (2)

thanks for the help so far, where does the earth next to the blower go to?
the exact problem is this: i stripped the car to a bare shell for a wee resto, i had the engine bay wiring loom back inside the car, after the bay was painted i brought out the wiring and refitted everything, easy enough as everything just goes where it should and plugs in etc.
the engine isnt back in yet and i havent checked if everything is working, but the blower isnt working, and it definitely was working before,

im thinking its an earth problem but i think all the earths are on correct, except the engine earth obviously.
could i bring an earth from the blower to the battery and see if that cures it?

thanks again for the help

kieran_macca

iTrader: (2)

bump, can anyone give me the exact locations of all earths?

g10ens

I refitted the loom to my 3dr a while back and im pretty sure i put the earth for the blower on to the part of the bulkhead that the bottom of the wiper motor bolts to, Im not sure if that's where it was originally as I didn't label it up before removing it as I didn't think it was important, I'm crap with electrics but I thought as long as it's earthed out somewhere it should be ok. My blower occasionally doesn't work but seems to be the plug slightly at fault as it will come on if I wiggle the plug about.

kieran_macca

iTrader: (2)

i never noticed an actual earth for the blower, i must check that in a minute. perhaps i should earth everything that doesnt work? lol

a new fault (yawn) that ive noticed is that the front d/s indicator and sidelight stay on all the time when the car is turned on, and the indicator light on the dash stays on constantly, when i plug out the bulb the dash light goes out, what could be wrong here?
i might have to take a course in electrics

g10ens

I'm pretty sure there was a seperate earth for the blower, im not a home at the moment so can't looks at the car to check.

kieran_macca

iTrader: (2)

thanks mate, ill take a look after dinner to see what i can find

martysmartie

iTrader: (1)

I suspect a bad earth re the drivers side indicator/sidelight, if a component has a bad earth it will earth through other means (If possible) thus the lights being on (I should think it's more of a glow rather than bright light?)

Current wants to get from positive to negative as quickly as possible and will take the shortest path possible, this is the reason as to why.

You haven't just been running connections from anywhere have you as this could cause just this?

Martin

clyde 1800

im from garvagh and have a 2000e its stripped out if you need you can take a look and see

kieran_macca

iTrader: (2)

your right, it is a glow rather than a bright light, im assuming this would be to do with the earths at the headlight panel?

do you mean putting earths anywhere they can go? if so then no, ive got all the earths in the correct place, except the ones at the negative terminal may be wrong although i think i have that sorted now too.

would the fact that there is no earth to an engine, bonnet or tailgate cause any of the above problems?

kieran_macca

iTrader: (2)

thanks, if im stuck i shall let you know and maybe take a look

tosh

As above mine goes to the lower bolt on the wiper motor fixing.

martysmartie

iTrader: (1)

Yes having no engine earth strap can cause all manor of problems!

In this case though it has to be something that comes live on ignition, as this is when the problem occurs, a crude way of finding the problem could be to pull the fuses one by one and then retrying and seeing if the problem disappears and if so what circuit, thus isolating the problem to one area.

Martin

kieran_macca

iTrader: (2)

I dont have this earth on either of my shells, perhaps its only like that on the older models? I found the problem btw, the live connection is doing nothing, i took a wire from the live to the +ve terminal on the battery and it works on al 3 levels at the switch inside, slight sigh of relief lol

kieran_macca

iTrader: (2)

Thanks for the help well i have now got the lights, blower, wipers sorted, now i just need to find and fix any other problems using this method, isolating the problem.
The lights where caused by a bad earth at the headlight panel, luckily enough, the blower was a live problem as mentioned above, the wiper motor was ceased which i have now changed.
Oh and the brake fluid bottle cap heating up was caused by the starter wire resting against a brake pipe and shorting the whole brake system. Its wierd how things can be caused by such simple things lol