Hi

any ideas where I could get a new bonding lead that bolts underneath the gearbox suspension mount to earth the engone and gearbox?
It's the herring bone multi strand type with eyelet connections on both ends.

Tried my local Ford dealer and it doesn't show on the exploded parts diagrams.

I considered making my own but don't have a clue what size/type of calbe I'd need.

Any ideas most welcome

Is you engine earthed? If so you shouldnt need to earth the box.

If not, ive just used regular battery guage cable, I think I got it from Maplins or somewhere similar. Not sure if there is an advantage to using the herring bone flexi stuff, if there is I may switch as my starter motor could run quicker.

If you do want to go herring bone, have you tried your local motorfactors, they may have a size that will fit.

[Edited on 14/2/2007 by greggors84]

Never saw a bonding lead when I took my Type 9 out of ye olde Sierra, but could you use a battery earth strap?

http://www.polevolt.co.uk/ or http://www.vehicle-wiring-products.co.uk/

Mike

Just get a nice fat battery type lead and use that. Only costs a few quid, and as said, if the engine's earthed, the box won't need it.

Most accessory shops carry a range of braided earth cables of varying lengths. If the engine has an earth strap or if the battery is connected direcly to the engine then a separate strap to the gearbox shouldn't be necessary though.
ATB
Phil

Ive seen these in various lengths on a rack in Halfords for not a lot of money.

I believe that you should always use a braided earth lead rather than a copper battery lead for engine to chassis earthing.

Reason being that the braided is designed to flex and as such is not susceptible to fatigue whereas a copper battery lead after much rocking of the engine could fail due to work hardening and fatigue.

Cheers

mark

Mark, yes and this is very importent as: if you have a choke cable or acclerator cable that's earthed, when the earth strap fails, the choke/acclerator cable conducts the starter motor current, get's very hot and ignites the petrol in the carbs on the inlet side. A great way to set fire to you car...

Dan

quote:

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Originally posted by Bluemoon
Mark, yes and this is very importent as: if you have a choke cable or acclerator cable that's earthed, when the earth strap fails, the choke/acclerator cable conducts the starter motor current, get's very hot and ignites the petrol in the carbs on the inlet side. A great way to set fire to you car...

Dan

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Bonding the gearbox is actually to stop wear.

It all to do with static electricity generated when the gears mesh erroding the cogs.

Anyway worth doing as a matter of course, good earths do not cost much, poor earths cause lots of spooky problems.

Regards Mark

mark chandler,

Thanks for that info I had wondered why their were two earths on the serria. I would have expected the gearbox to be earth very well via the engine, at least well enough to stop static build up (but not startermotor current!), any more info on this mark? Just intreasted..

Cheers

Dan