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Running not wired Alternator
#95804 Fri Jun 02 2006 08:29 PM
Joined: Jan 2004
Posts: 222
Shop Shark
I started my truck up for the first time in two years last week. (Yeah!) The resto is heading towards the finish line. It is all new and I have upgraded to an alternator. I have not put the wiring harness in as I still need to paint interior. Can the alternator be harmed by running it without being wired up to anything? Thanks in advance for any answers.
Steve O

1950 Chevy 3100
261, 4 speed
Purchased 1977

1964 Pontiac Lemans Convert
Re: Running not wired Alternator
#95805 Fri Jun 02 2006 09:35 PM
Joined: Jun 2004
Posts: 8,202
Master Gabster
Not if it,s used just a little. The current going through the brushes gives off a small amount of gas which acts like a lubricant. The brushes will wear out sooner but if just moved around a bit will not be noticable. A gen . is a different story. If the reg. goes bad & you keep driveing the gen. won,t last very long.

They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Running not wired Alternator
#95806 Sat Jun 03 2006 01:34 AM
Joined: May 2006
Posts: 8,490
Master Gabster
An alternator shouldn't make any current if it isn't hooked up. They requir some current to create the magnetic field, thats why an alternator can't recharge a completely dead battery. I would be more concerned about running the battery down than damaging the alernator. I would still avoid running it until you can hook up the wireing.

Bill Burmeister

Moderated by  Rusty Rod 

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