EZGO Marathon 1988 - F/R wiring woes

[poorpeter]

Got a new project, but never dealt with this one before. Motor was off and I've been looking at how to wire this thing back together...with the two F/R switches that I've been looking at, it almost leads me to believe that I have an older switch that used to connect to a resistor coil design which was upgraded to a controller design?? You got me.

The diagram shows a double microswitch, the second of which is connected to the black and white wires which lead to the potentiometer and ultimately the controller. My F/R switch does not have this second microswitch. It looks like the RED wire coming from the keyswitch was wired up to the MS-3 microswitch located near the solenoid, and the WHITE wire coming from the MS-4 was disconnected, as well as the BlACK wire from the reverse buzzer and the RED wire from the MS-2. So, without the second microswitch...I feel a little lost? Any ideas?

On a secondary note, I grabbbed 3 12Vs to test this thing, and it looks like the white wire needs to be connected to a 6v connection before the battery pack NEG...am I screwed into testing with 6V batteries only?

Thanks for the help!!

[JohnnieB]

MS-2 is the "Run" microswitch and its contacts are closed in both F and in R.
MS-3 is the pedal switch.

MS-4 contacts are closed only in reverse. One set places a fixed 5K resistor in parallel with the 5K throttle potentiometer effectively changing it to a 2.5K pot for 1/2 speed reverse. The other set sounds the 6V reverse beeper. The dual switch is no longer available, so you have to choose between having 1/2 speed reverse, or a reverse warning beeper.

The 6V beeper can be replace with a more modern piezoelectric one that work on full battery pack voltage and eliminate the need to tap the battery pack at 6V.

[poorpeter]

Appreciate the info, very helpful. For now, obviously going with the reverse option, maybe I'll look into finding a pieazzowhatsit reverse buzzer...but let's be real...how many people pay to have an annoying tone in their ear?

[JohnnieB]

Originally Posted by poorpeter

Appreciate the info, very helpful. For now, obviously going with the reverse option, maybe I'll look into finding a pieazzowhatsit reverse buzzer...but let's be real...how many people pay to have an annoying tone in their ear?

Some people pay dearly for not having that annoying tone.

[poorpeter]

Funny how cars don't have reverse buzzers, isn't it. Do Teslas have them? Legitimately don't know.

[JohnnieB]

Originally Posted by poorpeter

Funny how cars don't have reverse buzzers, isn't it. Do Teslas have them? Legitimately don't know.

The vehicle owner/operator probably isn't culpable if the vehicle wasn't equipped with a reverse beeper by the manufacturer, but if it was and it was disabled by the owner/operator than guess whose pockets get emptied.

I'm not a lawyer, but I used to maintain medical equipment, so I had to acquire more than a passing understanding of tort law and in a nutshell, if you modify a machine, you become the manufacture of that machine.

[poorpeter]

I suppose that makes sense. If you make a death tractor and it end ups destroying a town, I guess you should be liable for the manufacture of the tractor. Anyways, appreciate the advice, $50 doesn't sound so bad when you put it that way. Thanks for all the help!