mnikisher

2001 Safari Zanzibar Parsitic Draw On Chassis Battery

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Our 2001 Safari Zanzibar M-3896 has suddenly developed a parasitic 4 ampere draw on the cable from the battery terminal to the starter motor solenoid. The solenoid terminal has at least two other cables attached and I have not been able to determine where they terminate.

Has anyone here experienced this problem? Is there a source for wiring diagrams for this coach model?

Thank you all for your suggestions. I have not tried disconnecting each wire attached to the solenoid as it is very difficult to access that terminal. I was hoping for a solution so I could avoid that. I will try disconnecting the "large wire attached to the alternator" as soon as I finish mowing. I should mention that when the engine is running there is no current flowing through that cable.

There is a second cable that connects the chassis battery set to the power distribution buss under the bed inside the coach. That cable is also routed thru the "battery disconnect" switch in the maintenance bay. Interesting that one cannot actually completely disconnect the chassis battery set from the coach, contrary to what the user's guide suggests.

Edited by mnikisher
Adding detail.

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lenp   

Disconnect each of the cables at the solenoid (one at a time) and see which one is drawing the four amps then trace that one.

Lenp

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RAYIN   

There is a possibility the starter solenoid or ignition switch is failing. Have you noticed a change in the way your engine starts coinciding with the draw?

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On 9/9/2017 at 11:13 AM, desertdeals69 said:

Might check the big wire on the alternator.  Disconnect it and see if you still have the 4 amp draw.

There are two "big" wires connected to the alternator. The red wire (connected to the battery) and the black wire (connected to ground). Disconnecting the red wire does not fix the draw problem, disconnecting the black wire does. Counter-intuitive yes?

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wolfe10   

Do NOT operate the engine with the B+ wire off the alternator.  Quite likely, you will blow the diodes in the alternator.  In fact on boats with manual switches, that warning is printed right on the switch.

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wolfe10   
10 minutes ago, desertdeals69 said:

On the fancy switches it kills the rotor current before switching the battery cable to avoid blowing a diode.

Yup, there are marine "idiot-proof" switches made, but not on standard switches and certainly not if the B+ is just disconnected and then engine run.

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wolfe10   
27 minutes ago, BillAdams said:

What's B+?

The alternator B+ lug is the positive "out" from the alternator and generally connects to the center lug on a diode-based isolator or shares a lug  with the chassis battery bank positive on a solenoid-based isolator.

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