# 9 volts out of DC to DC converter
**URL:** https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399
**Category:** GEM Forum
**Created:** [October 6, 2016, 5:21pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399 "2016-10-06T17:21:50Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 6, 2016, 5:21pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/1 "2016-10-06T17:21:50Z")
My headlights are not working at full strength. And when I put a bolt meter on them they are showing 9 volts at them. Same Go’s for the 12 volt accessory out of the DC to DC converter.
We had swapped out a know working DC to DC converter and we had the same 9 volt output.
The grounds are good to go. Any tips
---
### Author:  [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)
#### Post date: [October 6, 2016, 6:12pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/2 "2016-10-06T18:12:26Z")
Whats the open circuit voltage - no load.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 6, 2016, 6:14pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/3 "2016-10-06T18:14:44Z")
Sorry I don’t understand.
---
### Author:  [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)
#### Post date: [October 6, 2016, 6:35pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/4 "2016-10-06T18:35:44Z")
What is the output voltage of your converter with nothing turned on. Is this a new condition or something you just noticed. Do you have aftermarket lights etc. The DC/DC converter is sized for stock load without much reserve.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 6, 2016, 6:40pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/5 "2016-10-06T18:40:39Z")
The condition developed after I installed my charger incorrectly so I think I zapped somthing. The output of the converter is still 9volts with nothing turned on.
---
### Author:  [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)
#### Post date: [October 6, 2016, 7:07pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/6 "2016-10-06T19:07:56Z")
You know what you gotta do.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 6, 2016, 7:26pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/7 "2016-10-06T19:26:37Z")
No I don’t that’s why I’m posting here.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 6, 2016, 8:20pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/8 "2016-10-06T20:20:50Z")
This is my voltage with no load on the DC converter
This is my Voltage with the Headlighs ON 
---
### Author:  [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)
#### Post date: [October 7, 2016, 3:27am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/9 "2016-10-07T03:27:19Z")
did you check input voltage?
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 7:41am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/10 "2016-10-07T07:41:20Z")
No. I did not check Imput voltage, what Pins or wires do I need to check
---
### Author:  [@Inwo](https://community.electricforum.com/u/Inwo)
#### Post date: [October 7, 2016, 8:07am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/11 "2016-10-07T08:07:34Z")
Do you have a picture or model number?
Send it to me if it’s bad.
Shouldn’t be too hard to fix if it’s just out of regulation.
Possible adjustment inside.
Or overheated current shunt resistor inside.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 9:29am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/12 "2016-10-07T09:29:02Z")
It’s VERY possible I shorted or burned something up inside it. All this started after I did the the Dammage to my Delta q charger by hooking up the 72 volt innerlock to ground. Is it possible that the interlock Relay you set up for me is playing havoc on 12 volt system?
Remember my car needs a Ground for the innerlock to work.
Here is a pic of my converter.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 9:29am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/13 "2016-10-07T09:29:35Z")
Modle
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 9:30am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/14 "2016-10-07T09:30:15Z")
We tryed taking the converter out of another working car and plugged it in and still same result
---
### Author:  [@Inwo](https://community.electricforum.com/u/Inwo)
#### Post date: [October 7, 2016, 10:12am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/15 "2016-10-07T10:12:39Z")
Sure power! I think that’s the one Rodney gave me a schematic for.
I’ll check.
---
### Author:  [@Inwo](https://community.electricforum.com/u/Inwo)
#### Post date: [October 7, 2016, 10:48am UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/16 "2016-10-07T10:48:44Z")
This shows connections.
Maybe the 12v to unswitched loads is loaded down or shorted.
Should have 12v without key on.
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 12:30pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/17 "2016-10-07T12:30:36Z")
Dave if you could let me know what wire should be input voltage that would be great
---
### Author:  [@Inwo](https://community.electricforum.com/u/Inwo)
#### Post date: [October 7, 2016, 12:44pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/18 "2016-10-07T12:44:01Z")
Pin 1=72B- (not grd)
Pin 12=72B+
Pin 9+10= 12v+ always on (limited power for radio)
Pin 7+8= 12v+ on with key
Pin 4+5+6 12v ground
Pin 3= 12v+ from key (turns on 7+8)
---
### Author:  [@grantwest](https://community.electricforum.com/u/grantwest)
#### Post date: [October 7, 2016, 12:55pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/19 "2016-10-07T12:55:44Z")
Thank you David :
So what should the voltages be at the respective pin numbers
And what does it mean when you say this 9+10 = 12
---
### Author:  [@Inwo](https://community.electricforum.com/u/Inwo)
#### Post date: [October 7, 2016, 1:32pm UTC](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399/20 "2016-10-07T13:32:51Z")
I’ll edit.
Pin numbers.
Pin 9 and pin 10 are both +12vdc
[Next page](https://community.electricforum.com/t/9-volts-out-of-dc-to-dc-converter/6399.md?page=2)