Bongo Fury

Thanks Julian,the L/B battery is brand new and the only thing I can find on the L/B circuit is the fridge which is switched off.I am still wondering if the switching wire to the relay is connected wrong,as the relay is active whilst turning the engine over.I also suspect the S/B but cannot find out any faults on it.I can`t test them with the hydrometer because they are both sealed batteries.
Going to a garage tomorrow to get a drop test on the batteries and find out if any are faulty in any way.Thanks again,all the info is great.Eric.

eckerB wrote:...The positive switching wire from the fuse box for the relay is activating the relay circuit,but I think it`s not deactivating as the ignition key is turned to start the engine?So,as I see it,the relay is constantly live when starting the engine and putting load on the relay,thus blowing the fuse.Does this sound if this is the problem and do I need to relocate the switching wire for the relay.Where on the ignition would I put the connection and how do I get to it?

OK the charging relay coil should be fed from the IG2 circuit, the easiest place to pick this up is on the fusebox by the drivers knee, the second row down of fuses is split into two sections one section fed by a Blue with White stripe wire this is the circuit you want to pick up after any one of the 3 fuses it feeds (right hand side of fusebox) BongoFury fuse numbers 14,15 or 16 (Mazda numbering 9, 10 or 11).
The other side of the relay coil should go to chassis.

If the relay has been fed from the IG1 circuit then yes the relay would NOT drop out whilst the starter is turning over, the IG 1 circuit is the Blue wire with no stripe, so it could easily have been connected incorrectly, and yes its quite possible that it could cause the Charging fuses to blow if wired up that way.

The 100Amp relay you mention with 70Amp wiring and 50 Amp fuses would be more than adequate, use it if you can!
If you want to feed more circuits from the L/B then use the Willinton kit method, take a separate fused wire from the L/B terminal rated at say 40 Amps with a 30 Amp fuse, feed this to a new fuse box (4 is normally sufficient) then from the other side of the new fusebox take 4 separate 20 Amp rated wires ending with small blade connectors which can then be plugged into the OLD fuse box after swapping out the fuses, the blade ends go into the lower connector of the swapped out fuse to pick up the circuit rather than the feed!

Thanks Geoff,I will check out the switching wire etc.Really appreciate all the answers guys,will report back when I get to sort it out.Eric.

He's not bad our Geoff... what he doesn't know about bongo electrics isn't worth knowing

Hear hear

Problem found!the switching wire had been wired to the BLUE wire! I will be rewiring this week sometime.Many thanks to all who replied to this thread,very,very, happy to have sorted this out.Cheers guys! Eric.