1998 270 Sundancer Alternator Wiring

nigel

New Member
Jan 24, 2007
68
South Coast, UK
Boat Info
1998 270 Sundancer
Engines
Twin 4.3Ls on Alpha 1s
Anyone an expert on wierd battery discharge problems...?

One (not always the same one!) of my starboard batteries will go completely flat after a few days without the charger on. Seems its discharging into the others somehow. Also, if I disconnect any two batteries, the remaining battery will sound the engine warning buzzer of either motor if I turn the ignition on. I disconnected the AC charger leads and it stops.. so even though the charger outputs are supposed to be isolated they seem to be shorted together.

But before I complain to the charger manufacturer (I replaced it less than a year ago!), has anyone got a diagram of the alternators/charging system for the twin 4.3L installation? - I want to be double sure there is nothing wrong there. In my manuals the altenators are missing from the wiring diagrams. Does the boat have a diode pack for split charging of the starboard batteries?

To add to my confusion there is a second set of cables from the port engine battery... I've the main cable, the AC charger cable and then another... plus a second -ve cable on this battery too.. which just dissapears into the wiring loom... where do these go?

Cheers,


Nigel.
 

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