Update
Looked at my current wiring layout..
Here is Ratwells voltage reg check
From my blue wire I have a black wire connected to it.
Found with the key on I get a voltage reading at the D+ plug ( blue/red) of less than 1 volt. If I disconnect the black wire I get 12 volts
This black wire ( which can be disconnected) goes from the plug into a sheath toward the battery then up, up across the hatch and down the inside of the left hatch to a battery aux relay.
( In this same sheath, also noticed a red wire going from the NEG battery post to the same relay)
my wire situation.
I just dont get why I would be getting my alt light on (and EGR) - the only thing I did to the alternator was to move it to remove and install the belt so as to check for endplay when engine was out
Comparing to this schematic ( as it should be)
I see big discrepancy in that I have a black wire going from my neg pos on main battery, should be off the postive. PO made this setup.
OK this is what I did...
I disconnected the red wire; one end from terminal #30 and other end from the negative post of main battery. I confirmed this wire is not connected to anything else and is continuous.
Coming from the same sheath, I disconnected the black wire ; one end from terminal 86, the other from the joining the blue wire near voltage reg. confirmed this wire is not connected to anything else and is continuous.
I hooked up both ends of the black wire.
I hooked up one end of the red wire to #30, the other end was to my voltmeter.
With the ignition off, volts = 0
With ignition on(engine not starting) volts = 0.02
With ignition on, Alt and EGR light on.
I started the engine Both Alternator and EGR light went off! 
My main battery was charging at 13.5V 1st time since the engine went back in!
Not sure why this should make a difference as this is how the bus was wired when i got it, and all was fine
Now testing the aux battery relay, with my voltmeter being connected to red wire going to terminal 30 showed an initial voltage of 0.2 but was climbing. after 10 minutes it was over 1 volt. Weird.
I was sure that my aux battery was not receiving a charge, but just to be sure no craziness was going on, I tested it - showed 12.5V
However, as #30 terminal was connected to the negative on my mainbattery terminal then the relay is probably toast -
I did this test...
(a) disconnect both the 87 and 86 wires from the relay. - should see 12 volts on the relay terminal 30 from the main battery and 12 volts on the disconnected 87 wire from the aux battery.
(b) connect relay terminal 86 to 12 volts. The relay should click in, and should be able to measure 12 volts on the 87 terminal.
(c) if both of these connections are true, reconnect the original wires to the relay, and all should be well. The aux battery should charge.
My relay failed at step B, - so I ordered another one.
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The apparent engine noise coming from the tranny area turned out to be a loose top on the heat exchanger which start to vibrate with increasing rpms. That was tightened, and seems good now
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No more gas leaking at my feet when I fill up the tank.
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The only thing now is it conks out when I start it, I have to re-start, keep my foot on the "gas" for about 10 seconds, then it keeps going, but has to be warmed up to run well. Timing seems to be fine.
Also I think... it is harder to get it into 1st and 2nd... in that the positions seem to be farther to the left... all the way to the left.
But this is so much better!.. things are looking better
Matt
Author
Topic: New Bus??? (Read 14687 times)