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Old 10-25-2020, 04:23 PM   #1
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Alternator Wiring ???

2005 Alpine Coach 36’ FDDS
Can someone tell me where the alternator wire goes to?
I am installing an Renogy DCC50S 12V 50A DC-DC On-Board Battery Charger with MPPT.
https://www.renogy.com/dcc50s-12v-50...ger-with-mppt/
I am not sure about the alternator wiring. Maybe the wiring is OK as originally from WRV or maybe I need to
Change that wiring – I’m just not positively sure and the last thing I need is to fry something. All the other wiring is straight forward and I already have it finished but I have not yet started the coach.
I have attached 4 wiring diagrams all showing basically the same thing except for the alternator.
I would appreciate help – but if you can’t give me a FOR SURE answer – PLEASE! – I don’t need more confusion. I know that sounds rude but …………………………… Sorry.
Sincerely,
TJ Shively
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Old 10-25-2020, 05:26 PM   #2
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Probably not helpful to your case- but on my super simple (pre-Vansco- not even a data port to read the ecm) 1998 36FDS the alternator lead connects to the center post of the battery isolator.
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Old 10-25-2020, 07:59 PM   #3
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Don't touch the alternator or wiring to it.

All you need is a wire with breaker to the start ( chassis ) battery. You will find that at your boost solenoid. All 4 pictures show that.
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Old 10-26-2020, 11:51 AM   #4
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Quote:
Originally Posted by twinboat View Post
Don't touch the alternator or wiring to it.

All you need is a wire with breaker to the start ( chassis ) battery. You will find that at your boost solenoid. All 4 pictures show that.
I am supposing the Alternator is already supplying VDC to CHASSIS STUD +
Am I correct? If YES then all I need to do is run a cable from the
CHASSIS STUD + to the Renogy ALT+ terminal.

I have already done that - not in these photos - but it is done.
I ran a 4 gauge cable from CHASSIS STUD + to Renogy ALT+ terminal.
Not fused.

Why do I need fuses or circuit breakers in the new lines?
Alpine never put any there.

Also I need a wire from ignition power (when key is turned half way) to the
Renogy DC-DC Charger to wake it up. Do you know where that ignition source is?

Thanks
TJ
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Old 10-26-2020, 01:15 PM   #5
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Yes, in your case, the alternator output wire goes directly to the chassis battery.

You need a fuse so that if the new run wire touch's ground somewhere, it doesn't burn itself back to the battery terminal. The fuse should be near the battery.
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Old 10-28-2020, 07:47 PM   #6
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Quote:
Originally Posted by tjshively View Post
I am supposing the Alternator is already supplying VDC to CHASSIS STUD +
Am I correct? If YES then all I need to do is run a cable from the
CHASSIS STUD + to the Renogy ALT+ terminal.

I have already done that - not in these photos - but it is done.
I ran a 4 gauge cable from CHASSIS STUD + to Renogy ALT+ terminal.
Not fused.

Why do I need fuses or circuit breakers in the new lines?
Alpine never put any there.

Also I need a wire from ignition power (when key is turned half way) to the
Renogy DC-DC Charger to wake it up. Do you know where that ignition source is?

Thanks
TJ
Tjshively,
Yes you are correct you need to connect to the cassis stud +.
And yes I know where to get the ignition sense wire.
Here is what I did for my install:
A) you need a “Extend a circuit fuse adapter” I got mine from Amazon.
B) On the fuse block on the back wall top Rowe very right fuse is for IGN./Eng. Unplug that and insert the adapter and the original fuse goes now into the adapter. A second fuse goes in there as well for the new wire that you connect to the Renogy terminal.

This will be a clean, secure and cheap solution.
Have fun
Joerg

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Old 10-29-2020, 09:39 AM   #7
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Altermator Wiring ???

I have attached a photo to make sure that I totally understand.
I apricate all the help. The last thing I needed was to mess this up.
I'll post photos when project is complete.
Thanks again.
TJ
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File Type: pdf Back Fuse Block.pdf (456.2 KB, 5 views)
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Old 10-29-2020, 09:46 AM   #8
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Photo not displaying correctly - will redo.
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Old 10-29-2020, 10:01 AM   #9
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Alternator Wiring ???

The photo attachment seems to be working on this post.
Thanks again
TJ
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Old 10-29-2020, 10:02 AM   #10
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I can open the attachment. Yes it’s the wire on the fuse block. The orange wire is a repair I did as the refrigerator wire was somehow miss wired by either the factory or former owner. Anyways it’s for something else.
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Old 11-05-2020, 10:12 AM   #11
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Another question - Please.
How did you handle the Big Boy Solenoid?
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Old 11-05-2020, 10:38 AM   #12
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I disconnected the control wire for it.
So I have and don’t want a connection of the house and chassis battery controlled by the Vansco. If I would need the boost button for any reason I can simply reconnect the wire.
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