jsteiner4
Newbie
Posts:6
Registered Users
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| 06/07/2007 9:32 PM |
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| I'm a newby to the forum so I hope i've posted is in the correct place. That said, I am doing a refurb on a 1987 Fleetwood Southwind class A. I am looking for a wiring diagram or any help for a Chevy P30 battery isolator, I've looked all over the net and have found that the isolator used with the delcotron alt. is supossed to have 4 terimnals but the one that came on mine only has 3 terminals. [It appears to have been replaced recently by the former owner, who was not very handy. ] The coach and chassis batterys are hooked up to terminals 1 and 3 and the charge wire from the alt. is hooked up to terminal 2. I have not had it on the road since it was purchaced as I've been going through all of the systems on the coach and chassis one by one, and would like to be sure of the charging system as well. Any help will be welcomed. |
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COOPERHAWK
Moderator
Expert
Posts:838
Administrators
East Central Minnesota
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| 06/08/2007 9:09 AM |
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| Welcome to the forum. A lot of the folks here have the P30 chasis and will answer your question in time. Right now they're all either working or camping. I have the P30 myself, but it is with a diesel engine so the electrical is defferent. Got any pics of your unit? We love pics. Also, try the chat night on wednesday. We get a lot of the technical guys their. |
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1985 Airstream 345 Turbo-Diesel
VFW,Legion, NRA
FAA Air Traffic Control Supervisor (Retired)
http://www.cooperhawk.net
mailto:jimcooper@cooperhawk.net
"People are okay in ones and twos. After that number they tend to choose up sides and wear arm bands and berets." |
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jsteiner4
Newbie
Posts:6
Registered Users
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| 06/15/2007 4:57 PM |
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| Thanks for the welcome. As far as pics go I'm planing to do a repair on a delamination on this rig and I plan to take quite a few pictures during that procsess. Hopefully it will be helpful to the other members. |
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Balrgn
Moderator
Expert
Posts:805
Registered Users
Southern NH
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| 06/21/2007 1:42 PM |
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| Thought I would bump this one up to the top, have you gotten anywhere with your problem? |
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1977 Argosy 20
454 V8 Gas
Southern NH
Maintenance Analyst
www.balrgn.com |
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jsteiner4
Newbie
Posts:6
Registered Users
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| 07/03/2007 8:20 PM |
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| Sorry it took so long to get back to the forum, took the old girl out for a shake down camping trip. All went well with the rig, ducktape held the delam from flapping in the wind. Main battery and coach batteries seem to be charging but I still feel the the wiring is jury rigged, [missing fuse links, etc.]. I just don't want to let any smoke out of the wiring's insulation if you know what I mean. Thanks for kicking this back to the top, hopefuly someone will know something. |
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85/345
Not a Newbie
Posts:34
Registered Users
Marietta, GA
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| 08/22/2007 10:21 PM |
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I'm having a problem with my battery isolator also. Got a couple of questions. Is there anyway to test one? If so how? Does the voltage regulator have anything to do with the battery isolator?
The problem I'm having is the alternator is putting out too many volts, figured this out by hooking volt meter to battery. The alternator was putting out 18v until I cut the engine off. From what I know the alternator should only be putting out between 13.5 to 14.5v. |
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Brian Paden
1992 Monaco Crown Royale
1985 Airstream 345 (For Sale) |
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COOPERHAWK
Moderator
Expert
Posts:838
Administrators
East Central Minnesota
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| 08/23/2007 10:40 AM |
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| I don't see how the Isolater could influence the voltage. The voltage regulater in mine is built into the alternator. |
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1985 Airstream 345 Turbo-Diesel
VFW,Legion, NRA
FAA Air Traffic Control Supervisor (Retired)
http://www.cooperhawk.net
mailto:jimcooper@cooperhawk.net
"People are okay in ones and twos. After that number they tend to choose up sides and wear arm bands and berets." |
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85/345
Not a Newbie
Posts:34
Registered Users
Marietta, GA
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| 08/26/2007 11:06 AM |
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Still haven't resolved the problem but I now know how to test a battery isolator. Got this from the RV Doctor.
"here's how to check the isolator using a DC voltmeter. First, measure the voltage at all three terminals of the isolator with the engine completely off. You should be able to read each battery voltage independently on each of the outside terminals. If there is voltage on the center terminal, one of the diodes in the isolator is faulty and the complete isolator must be replaced. (Some VOMs do have a diode test circuit to double check the diodes in the isolator). If voltage is only read on one of the two outside terminals, there is an open in one battery system. Next, start the engine and check the voltage at the center terminal of the isolator; it should be at least 13.8 volts and there should be an increase in the voltage measured at the two outside terminals, though it will be less than the center terminal. If you have access to a clamp-around DC ammeter, you will be able to measure the charging current on the alternator output wire. Additionally, be sure to check all the cable connections at each battery very carefully. I just ran across the same symptom as yours and found a corroded ground cable from the engine battery to the frame ground. If you are sure the alternator is functioning as it should and the isolator tests good, you just may have a cable problem."
So I did this and I'm getting voltage on the center terminal. But just to make sure the RV Doctor knows what he's talking about would someone test their battery isolator to see if they are getting any volts on the center terminal.
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Brian Paden
1992 Monaco Crown Royale
1985 Airstream 345 (For Sale) |
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COOPERHAWK
Moderator
Expert
Posts:838
Administrators
East Central Minnesota
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| 08/26/2007 11:15 AM |
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| Can't do it today, but will check tomorrow morning. |
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1985 Airstream 345 Turbo-Diesel
VFW,Legion, NRA
FAA Air Traffic Control Supervisor (Retired)
http://www.cooperhawk.net
mailto:jimcooper@cooperhawk.net
"People are okay in ones and twos. After that number they tend to choose up sides and wear arm bands and berets." |
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COOPERHAWK
Moderator
Expert
Posts:838
Administrators
East Central Minnesota
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| 08/28/2007 5:50 PM |
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| I checked today and I am not getting voltage on the center terminal. Hope that helps. |
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1985 Airstream 345 Turbo-Diesel
VFW,Legion, NRA
FAA Air Traffic Control Supervisor (Retired)
http://www.cooperhawk.net
mailto:jimcooper@cooperhawk.net
"People are okay in ones and twos. After that number they tend to choose up sides and wear arm bands and berets." |
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