Good Sam Club Open Roads Forum: Class A Motorhomes: Leece Deville alternator


Open Roads Forum	Already a member? Login here. If not, Register Today! \| Help

Newest | Active | Popular | RVing FAQ

Forum Rules | Forum Posting Help and Support | Contact

Open Roads Forum > Class A Motorhomes > General Topics

Reply to Topic | Subscribe | Print Topic | Post New Topic |

m.sessions

west coast

New Member

Joined: 09/21/2020

View Profile

Offline

Posted: 09/21/20 09:15pm

Link | Quote | Print | Notify Moderator

2000 Newmar dutch star cat engine diesel. Our question is: What would cause loss of power from ignition to alternator.

MrWizard

Traveling

Moderator

Joined: 06/27/2004

View Profile

Posted: 09/21/20 10:00pm

Link | Quote | Print | Notify Moderator

Do you mean the alternator is not charging the battery

Power flow is from battery Too ignition
And from alternator to battery

excitation of the alternator field winding come from the voltage regular and / or the engine CPU

Radiate The Happy
....

Connected using Verizon and AT&T
1997 F53 Bounder 36s

wolfe10

Texas

Senior Member

Joined: 10/08/2000

View Profile

Offline

Posted: 09/22/20 07:16am

Link | Quote | Print | Notify Moderator

If this is a DUVAC alternator, these are the connections:

B+ to battery isolator (large-gauge wire)

Ground-- may be separate wire or may ground through engine (metal to metal)

Ignition hot small terminal/excite terminal-- gets power from any ignition hot connection in engine compartment

Sense small terminal-- small gauge wire connected anywhere on the "battery side of the battery isolator".

The last two are small gauge wires and can break. Pretty easy to check with a digital voltmeter.

* This post was edited 09/22/20 06:46pm by wolfe10 *

Brett Wolfe
Ex: 2003 Alpine 38'FDDS
Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240

Diesel RV Club:http://www.dieselrvclub.org/

theoldwizard1

SE MI

Senior Member

Joined: 09/07/2010

View Profile

Offline

Posted: 09/22/20 04:24pm

Link | Quote | Print | Notify Moderator

MrWizard wrote:

... excitation of the alternator field winding come from the voltage regular and / or the engine CPU

Depends on the "vintage" of the charging system !

On older charging systems, the field was "excited" through the key and the "idiot" light. If there idiot light had failed, the alternator would not get excited when you started the engine. It may or may not "self excite" after the engine was running.

[image]

Ivylog

Blairsville, GA and WPB, FL.

Senior Member

Joined: 06/30/2004

View Profile

Offline

Posted: 09/24/20 07:13am

Link | Quote | Print | Notify Moderator

With only one post I can’t tell your abilities on testing??? Are you saying when you turn the key on there isn’t 12V at the alternator or the alternator does not work???

This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.

08 HR Navigator 45'
Sold 04 Dynasty after 14 great years.
[url=https://i.

Reply to Topic | Subscribe | Print Topic | Post New Topic |

Open Roads Forum > Class A Motorhomes > General Topics

	New posts		No new posts
	Closed, new posts		Closed, no new posts
	Moved, new posts		Moved, no new posts

Adjust text size: