Re: 12V warning light

Posted by Bob M on December 07, 2004 at 13:28:17 from (151.190.254.106):

In Reply to: 12V warning light posted by Bubba on December 07, 2004 at 11:31:38:

Bubba – That lamp serves two purposes: 1 – It provides path for the initial current necessary to “flash” the alternator field to begin charging at startup, and 2 – It burns whenever the ignition is on and the alternator is NOT charging – same as the charging system idiot light in your car.

You don’t absolutely need the warning lamp. You can substitute an equivalent series resistance or a properly sized and wired diode in place of the lamp.

You can also wire the #1 alternator terminal directly to the ignition switch. However with this arrangement current from the alternator will backfeed the ignition coil after you open the ignition switch making it impossible to shut down the engine.

Personally I prefer the warning light. It’ll tell you immediately if the alternator quits working, a nice feature when others (who don’t understand or don’t check the gages) are using the tractor. The light will also come on should the water pump seize or the fan belt break providing an early warning of an overheat condition.

Follow Ups:

Post a Followup Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]