Here's a test procedure to determine if the Grizzly is blown: 1. Disconnect all leads from the controller. 2. Connect a light bulb between V+ and V- to make sure the caps are discharged. 3. With ohmmeter, measure resistance from M- to V-. Should read 50k-100k ohm
If step 3 yields a few ohms, the FETs are toast . I can help you if you want to have it rebuilt. Dave ----- Original Message ----- From: "1sclunn" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, October 11, 2002 8:20 AM Subject: Re: trouble shooting a used Grizzily controller > this is going to be a Fast car , my 2nd ev was a Mercury Lynx and the best > out of 8 so far. There could be a real problem here. 1 try spinning the > motor with a 12v bat (unhook one wire from controller them run 2 wires to > 12v bat to motor) I don't think this is the problem but its good to know > that the motor is OK. hook a light between motor and controller on the > wire you just took off (so if the controller is burn out and is full on the > motor won't take off (keep out of gear HA HA) . try your test again . Dose > this thing have a fuse? You don't want to put 205v to a dead short. > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, October 09, 2002 5:59 AM > Subject: Re: trouble shooting a used Grizzily controller > > > > > I have bought my first EV. The car is a 1986 Ford Escourt. The > > > (16) batteries (192v) are installed to 205v, the contactor is > > > working (12v) when the key is turned on but the motor does not > > > run when the accelerator pedal is depressed. Having been > > > advised to bridge the contactor with some load such as light > > > bulbs (I used two 75w/110v bulbs in series) to allow the > > > controller to charge, I found that the lamps illuminated to > > > normal brightness for a few seconds then both bulbs got > > > brighter! Alarmed, I opened the circuit breaker. What should I > > > expect at this time? Is this the correct response? > > > > I would expect the bulbs to light brightly at first, then > > quickly dim or go out altogether as the voltage at the > > controller increases. If you then press the accellerator, the > > motor should give a little turn and stop as the capacitors > > discharge, and the light would go bright again. > > > > Good luck. > > > > Evan. > > > > > > > > > > >
