Curtis PMC golf car ECU

[2PAC Mafia]

Hi,

I´m trying to repair this ECU. It´s PN: 73326G06 (1206MX logic board). I have found the mosfet H bridge damaged, some gate resistors and the driver. This I already replaced but now I have the problem with R66 which is burnt and I can´t know the original value. It´s going to a colector from TIP112 in one side and to J1 pin 1 in another side so it seems it has to do with the forward and reverse selector. Does anyone have this unit or similar to know the value? I think it´s a current limit resistor.

General diagram:

http://ww2.justanswer.com/uploads/KO/koboma/2013-11-29_030147_ezgo_pds.jpg

Some pictures:

http://www.restoretronic.com/descargas/Curtis PMC/1.jpg
http://www.restoretronic.com/descargas/Curtis PMC/2.jpg (burnt resistor)
http://www.restoretronic.com/descargas/Curtis PMC/3.jpg
http://www.restoretronic.com/descargas/Curtis PMC/4.jpg
http://www.restoretronic.com/descargas/Curtis PMC/5.jpg

 

[MikeMl]

I am just now looking at buying a used golf cart. I understand that these controls can be sent in for overhaul, or a defective unit can be exchanged for a defective one at much less than the cost of a new one...

It appears that the high-current winding in the motor is switched only by a solenoid, while the low-current winding is controlled by the H-Bridge, both for speed-control and reversing...

 

[2PAC Mafia]

Hi Mike,

this is the circuit involved to R66, it´s difficult to follow because the board has 3 or more layers. Should I make a jumper at R66 and try it first or would you select a low value resistor?

http://www.restoretronic.com/descargas/Curtis PMC/R66 circuit.jpg

That philosophy about ECU cars repair or exchange is also here, about normal cars. This golf car ECU is from a customer.