Re: (ET) Strange Alltrax behavior

[Jim Coate <lists freerangeelectric com>]

It could be the contactor drive circuits in the controller are dead, 
which you don't want to hear.

But first... by memory at least the contactor coil gets the "+" side via 
the microswitch on the throttle (or brake pedal? or some switch?). The 
"-" side of the coil is what the controller drives. So rather than just 
measure the voltage at the coil terminals, measure the voltage between 
the coil terminal driven by the controller and battery "+" (or battery 
"-" if I'm saying all this backwards).

This is on the off chance that the controller is just fine and the 
wiring to the other side of the coil is flakey.

Good luck.

On 07/17/2019 3:25 pm, Steve Gaarder wrote:
> Found my spare contactor, and swapped it in.  No change :-(
>
> Steve
>
> On Wed, 17 Jul 2019, jlantonucci comcast net wrote:
>
> > Have you tried replacing the contactor?  I've seen older one act up 
> > like this.
> >
> > Sent from my T-Mobile 4G LTE device
> >
> > ------ Original message------
> > From: Steve Gaarder
> > Date: Tue, Jul 16, 2019 3:32 PM
> > To: elec-trak cosmos phy tufts edu;
> > Cc: scarecrow gmail com;
> > Subject:(ET) Strange Alltrax behavior
> >
> > I have an E-15 with an Alltrax controller.  The speed control pot is 
> > on a throttle lever and the foot switch is controlled by a s
> > eparate switch.  The first time I start it up it's ok.  I turn on the 
> > key switch, the contactor closes and then opens a few secon
> > ds later.  I turn on the "foot" switch, the contactor closes, and off 
> > we go.  It's all fine till I turn off the foot switch.  Aft
> > er that, it will not run.  Turning on the key switch makes the 
> > contactor close, again for a few seconds, but it never closes agai
> > n, until I let it sit turned off for 15 minutes or more.Any 
> > ideas?Steve Gaarder_______________________________________________Ele
> > c-trak mailing 
> > listElec-trak cosmos phy.tufts.eduhttps://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
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--
Jim Coate
www.FreeRangeElectric.com
Home of The Electric Tractor Store