Whew, finally....

Around noon I lowered this from the jackstands and drove it off of the slab and around the block. What a relief. Humorously I thought I had no reverse gear (and needed a forward/reverse switch), but then remembered VW has the stick push/shift for reverse.

This sight is one I've been waiting for for a long time, to see it on its first charge. Now I just need to register it w/ the State of Missouri and get a motor mount (right now the motor is secured by a strong rachet strap). Quite relieved and excited, though that's a bit understated. I'll be now spending time fixing up some of the rust and other things I put off to get this thing roadside.

In short, it took me about 100 hours of actual physical labor time to get this far, though the mental labor time started somewhere in early April and is on-going. I was given this car by my closest friends, who are generous and supportive people. They didn't want to deal with the mechanical issues but wanted it 'in the family'. I didn't want to deal with used car issues either, so I converted it, thus eliminating most of the issues I hate working on w/ cars (e.g. fuel pumps, oil seals, head gaskets, radiators, water pumps, etc, etc).

As an homage to my voltmeter wire, I'll leave this as a reminder to myself to not stop thinking.

Square 3820.1113

Ok, so I got back to the place I was earlier today and just posted this on a few EV lists trying to get some help as tonight, after I cleaned up my major mistake (I'm still reeling from that, so scary), I tried to troubleshoot again and found myself still unsure why things aren't working properly. So, here's another place I'm posting in case anyone has answers who might possibly stumble onto this posting.

So I literally only have to solve this problem and then I'll have my '73 squareback roadside instead of on jackstands. So, I am pleading for help here as I am totally stumped. I'll try to best explain this problem.

Essentially, I am able to run the motor when I connect a cable from the KSI terminal directly to the secondary contactor (battery side), skipping over both the 12V/30A relay and the KLK fuse (I'm following the EVA wiring diagram). I tried a new relay and new KLK fuse to eliminate those issues, as well as tested the ohm readings on the potbox and adjusted it (1-3 ohms disengaged and maxs out around 4800, and reads under 100 before it 'clicks on'). I've even tried to adjust the microswitch on the potbox, but I'm not sure I did it right and also it didn't seem to have any effects. Unfortunately, the motor doesn't engage when I have it wired up from KSI to relay (30), relay (87) to KLK fuse, KLK fuse to secondary contactor. I even tried connecting up the two input wires together (that usually go to 'Com' and 'No' on the potbox) to close the secondary contactor w/ the ignition switch instead of the pedal and that didn't effect performance.

In case it helps, here are a few general points. I have a 1221c Curtis controller on a 96V system w/ two Curtis SW220 contactors. I have test the 8" DC motor w/ a 12V battery and it spins the wheels. I have tested the voltage on the battery side of both contactors and register 96.8V as well as from B+ to B- on the controller when the potbox lever is engaged. I register 90% of this from the KSI (positive probe) and the negative side of the first battery (negative probe).

If I need to include more information for troubleshooting, I'll be happy to add it.

I need to find out more about microswitch adjustment on the potbox, but the Curtis manual unfortunately is not much help there.

My new prediction is that I'll either: sell this car, set it on fire, or watch it rust to nothingness while I continue to try to fix it. I've committed the ultimate newbie fallacy on this blog: predicted success rates and completion times when I don't even know what success and completion look like. I should have learned by now that it will be done when it is done, and I won't know when or how until well after that point looking backwards.

stopped thinking and livid

The microswitch on the potbox turned out not to be the problem as I bypassed the potbox (thus having the secondary contactor turn on w/ the ignition) and it still didn't work. So, back to the drawing board. I tried attaching the ksi to the secondary contactor via the line from the KLK to the secondary contactor, and didn't stop to think that the voltmeter cable was also in the connection (w/o the 2amp fuse, which is hard to find). I just fried my voltmeter cable by connecting it up wrong w/ the ksi to secondary contactor. Seeing smoke pour out after I turned on the ignition was not what I needed to see. I hesistated posting this, but hey, this is part of what happens when you get close to completion and stop thinking and backtracing connections to ensure safety, especially when bypassing. I'm so discouraged and embarrased, but it could have been much worse. I'm going to check all my input wiring now for melted insulation and this will hopefully solve my problem in the process, though doubtful...

Potbox Microswitch issue

I'm told (again by Bob at EVA) that the microswitch in my potbox needs adjusting as the ohm's being generated are greater than is acceptable for the high-pedal protection. This fine tuning is so hard to do when I don't know how hard to turn the screws. I could bypass this, connect the two positive wires together which are part of the ignition switch line and drive the vehicle, but I like the second contactor coming on w/ the pedal, not the ignition switch. Hopefully still today I'll be cruisin' down the street.

Not w/ a bang, but a whimper

Today was painfully ended by the darkness when I think I may actually be at the point that I can lower the car off the jackstands and drive it off this pad. It is a long (and probably boring) story of today's work, but I am hopeful that tomorrow will be the day...

Here's the short (or possibly medium) version. I thought I had a bad controller or that my motor-transmission connection was bad and thankfully, it was neither. I did the 12V battery test to the motor first thing this morning and was delighted to see the wheels turnover. Then, after some troubleshooting w/ Bob at EV America (who has been in this business at least 20 years was himself confused), he suggested to bypass the relay and the KLK fuse and go from the KSI terminal directly to the secondary contactor on the positive (battery) side. Did this w/ some spare jumper cables and viola, when I depressed the pedal the wheels turned over and I heard the high-pitched whirl I've read about.

So, this afternoon I worked all through trying to find out how to fix my input wiring issue. Thankfully, nothing in the 2/0 cable run is miswired. Everything checks out. To omit what is actually the long part to the explanation of this day's work, I think I had the negative side (going to the auxiliary battery, controller fan, and both contactors' negative spade terminals) miswired. This is what I am hoping is wrong, b/c everything else I've checked seems to be showing me that this is where the circuit from the potbox (when I depress the accelerator pedal) is incomplete and thus not sending the signal to the motor from the controller....

We'll see...

There, but....troubleshooting begins

Well, I finally have the cables cut, stripped, connectors crimped, connected, insulated, etc...Everything I can tell is now done, but when I press on the pedal, the motor doesn't turn over. I'm a bit perplexed and hope my motor isn't bad. I'm going to do some thinking tonight but I am hugely relieved to have the battery pack all hooked up and registering on my voltmeter at 96V+ (which is just what I thought via my testing on a few individual batteries). Now it is just figuring out if my controller is bad, my motor is bad, or if some of my more minor wiring is done wrong and impeding a full test. The one thing I'm worried about is that the transmission isn't engaging b/c the gearbox was misaligned w/ my ICE engine removal or that my mounting of motor was done incorrectly. The second doesn't seem to be anything too big to address as it is only four bolts to get the motor off. More later....

Almost there 2.0

This time around, as far as I can tell, I show be test driving the car this week. I just crimped and heat shrinked most of the 2/0 cable today and am only 3 cables shy of the 2/0 being fully done. I still have a few cuts and fuse insertions to do, as well as get the motor mounted and purchase a voltmeter and ammeter. Otherwise, I think that tomorrow I'll review things and possibly take the plunge and complete the circuit and push on the gas pedal...more postings tomorrow, I'm exhausted, but excited.

Finally!

Received the battery cables on Friday and am borrowing a hammer crimper from one of the MAEAA people tomorrow. So, I am hoping to get some time on the car tomorrow and Tuesday (weather permitting), so that I can test drive it...sometime this week??? We'll see.

I've still got to contact a welder to get a motor mount fashioned and to vent my batteries, but other than that, I am good to go on the technical side of things. Some cosmetic issues reside w/ the car, but that can wait. Pics will follow when I get my microSD card back in my phone. With all the labor I've been putting into our house, my car has sat alone for two weeks now (w/ one day of about 2 hours of labor). But this week my goal is to post a pic of it before/after the test run.

STILL waiting...

I have made no more progress than the last posting b/c I am STILL waiting on the 2/0 cables. I can't believe this, EVA should work on their stated importance of customer service.

Still waiting...

So I am finally back online (took a week to get our ISP to get us online) and I am two charger cables and the 2/0 cable (all around, 34+ lugs to crimp) away from the test run. I will post a pic of where I am now working, unfortunately quite exposed and now battling the bugs while I work (not to mention the midwestern humidity). We are working on our house now (porch renovation, kitchen wall removals, etc), so it is competing w/ my work time on this, but that is fine, as I'm still waiting to get my 2/0 cable via UPS (long, annoying story) and I have yet to find a place to rent a hex crimper from. Hopefully in a few weeks I'll take some time to post a long, rambling explanation of the vehicle and accompany it w/ some pictures. This car is a perfect EV candidate, w/ lots of options for wire runs, components placement, battery location, and a high gross vehicle rating (3500lbs and 2000+ rear axle max weight).