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1971 GMC 1500
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Discussion Starter · #1 · (Edited)
Please forgive me, I have watched Damien Maguire videos I have been to the OpenInverter.org wiki and I'm a moron I can not read no wiring diagrams, I have also spent minutes searching this forum for any builds that would have these pics, and I am witnessing a familiar trend and that is where the pics have vanished because they were linked to instead of uploaded to this forum, anyway what I am looking for is some pictures of how you would hook up the Lexus GS450H transmission to its OEM inverter and then to the rest of the minimal components to get it to spin for the first time.

all I know so far is that the two fat orange cables that usually come with the gear box bolt up to the OEM Inverter obviously, please be gentle as I am learning here, and this may also help others out

Scenario 1. (no battery pack) just using a Bench DC Power Supply

Scenario 2. using batteries but out of the car on the shop floor type of thing

=== adding this Fun Facts section that may help some people out ===​

1. you do not need 300 plus volts to bench test your system ie Inverter / Transmission, Damien runs his bench tests as low as 40 volts using a bench DC power source gizmo (if any of you know the make and model of this machine please post it in this thread)

2. in order for both motors to work ie drive the output shaft the input shaft (the one in the front of the transmission) needs to be locked, this can be achieved using the center piece of the OEM clutch plate looking disc (please let me know the proper name of it) and a metal bar or plate bolted across the bell housing of the transmission to prevent the input shaft from spinning (the two speed planetary gears inside the transmission then do their magic allowing both motors to spin the rear shaft and send more power to the wheels)

3. there is a small 12 volt electric oil pump attached on the passenger side of the transmission it needs a separate controller to operate, when buying your transmission make sure it comes with that oil pump and hopefully it's low voltage black wire loom. The little controller box you will most likely have to purchase separately

including a stock pic of the engine bay showing the inverter (upper left) for funsies

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1971 GMC 1500
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199 Posts
Discussion Starter · #2 · (Edited)
of course I found mauswerkz videos here Lexus invterer and transmission running on 200v but it is difficult to see how it connects to the high voltage battery pack or the low 12 voltage source

this is just a pic of the transmission for the uninitiated, it shows the two fat orange high voltage cables running up and to his inverter which was placed above the trans on the workbench (not to be confused with the orange tie down straps, ha ha)

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Discussion Starter · #3 · (Edited)
here is another example from Artur Kustusch the problem with this one is that he is using a Camary inverter Lexus GS450h drive-train connections and again we can not see how everything is wired up

Things I learned from this video:

1 that perhaps using the stock OEM low voltage wiring harness we connect from the driver side of the transmission two resolver connections (which may include temp sensor wires) to the OEM inverter, (though he shows how he connected to the Camary inverter in his video)

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2. we would run two orange high voltage wires from the side of the OEM inverter to the battery back via a pre charge something or rather, ha ha
 

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1971 GMC 1500
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Discussion Starter · #4 · (Edited)
and here is Lexus GS450H Transmission OpenSource Controller First Test by Damien Maguire

here we can see how the two high voltage orange wires connect the Inverter to the batter although with the Booster Converter removed (aka bypassing it)

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in this next video Lexus GS450H Gearbox Hybrid to EV we can clearly see the big orange high voltage wires connecting the Transmission to the Inverter as well as some smaller black low voltage wire harness connecting the axillary oil pump controller to the oil pump (small silver box resting on top of the transmission)

Note: a lot of that black OEM low voltage wiring harness and plugs/connectors does not end up getting used with the DIY VCU

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1971 GMC 1500
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Discussion Starter · #5 ·
I believe in the stock vehicle the high voltage battery lives behind the back seat, as well as the low voltage "regular" 12 volt car battery, and here's what those connectors look like, and I think they just run under the car to the Inverter, please correct me if I am wrong

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