Hi David, Thanks for the reply… I am not in front of the service manual now. I thought J8 was for low volage signals. When I ohm out J8-4, is chassis ground not B-. I am not getting DC/DC 12V on the DC/DC relay and nothing on J8. What would be preventing the DC/DC converter from turning on?
It’s usually a bad dc/dc converter. You need to make sure you have 72 volts power and ground going into the converter. If you do but don’t have 12 volts coming out, then the converter is bad.
Does yours have two converters? The wiring will reach from one to the other.
Only one DC/DC converter. Are you sure that nothing on J8 needs to be tie low to ground the DC/DC?
If it hasn’t been modified the dc/dc converter only have four wires going to it. Two 72 volt power and ground and two wires out, 12 volt power and ground.
What a horrible place Ford mounted the DC/DC converter. Is it possible for you to pull J8 out from the in instrument cluster PCBA to see if you still have 12V accessory power?
Ya I’m not sure what they were thinking especially when it can be mounted on the outside of the same frame rail. You can unplug it and test for 72 power and ground. If that’s good, jump 12 volts power and ground to the connector from one of the batteries. If the 12 volt things work you know the converter is bad.
I will not get a chance until this weekend to test the voltages. If it is bad, what kind of screws are holding it? Can you still purchase one? I don’t see an option to do a global post on the forum. Thanks David!!
They’re riveted on. I would just mount it on the opposite side of the frame rail where the second converter is mounted when they have two. Yes, you can find them but they’re not cheap. Most people opt for ones found on amazon that are a fraction of the price or upgrading to the delta q charger that has a built-in dc/dc converter.
Hey David, may I get the manual, too?
tracy@badass.energy
Hey Woodburn-
The address you supplied is not complete.
Thats the whole email. If it doesnt work you can email badassenergyinc@gmail.com
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I would love a wiring diagram David, thanks. isaacs22@msu.edu
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Could you email the manual? I just joined this forum. Thanks
jwmotai@yahoo.com
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Can you semd me the wiring diagram brotha would greatly appreciate it arthurcarreon33@gmail.com
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I lost it on my phone. Can you kindly re-send the manual? Thanks,
Mike
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