# Intermittent DC-DC Converter

**URL:** <https://community.electricforum.com/t/intermittent-dc-dc-converter/12283>\
**Category:** GEM Forum\
**Created:** [April 17, 2017, 1:56am UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283 "2017-04-17T01:56:39Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Bob\_GV](https://avatars.discourse-cdn.com/v4/letter/b/45deac/32.png) [@Bob\_GV](https://community.electricforum.com/u/Bob_GV)\
**Post date:** [April 17, 2017, 1:56am UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/1 "2017-04-17T01:56:39Z")

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I bought a low mileage 2000 E825 in December, and it has an intermittent problem that I’m hoping someone here can help me diagnose. Every week or two, the DC-DC converter stops working (so no 12v accessories). If I leave the master battery disconnect switch open overnight, it sometimes comes back, sometimes not. Sometimes it comes back to life on its own.

Any ideas?

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**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\
**Post date:** [April 17, 2017, 4:11pm UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/2 "2017-04-17T16:11:27Z")

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Unplug all connections to converter and spray with contact cleaner. Several times.

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**Author:** ![Bob\_GV](https://avatars.discourse-cdn.com/v4/letter/b/45deac/32.png) [@Bob\_GV](https://community.electricforum.com/u/Bob_GV)\
**Post date:** [April 18, 2017, 9:01pm UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/3 "2017-04-18T21:01:29Z")

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I cleaned the connector pins and sockets with CRC contact cleaner - still have the problem. Any other ideas?

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**Author:** ![RussJ](https://avatars.discourse-cdn.com/v4/letter/r/a87d85/32.png) [@RussJ](https://community.electricforum.com/u/RussJ)\
**Post date:** [April 21, 2017, 12:50am UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/4 "2017-04-21T00:50:34Z")

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Is it the same Shure 72V converter that is on the newer cars? I might have a used one to sell.

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**Author:** ![Bob\_GV](https://avatars.discourse-cdn.com/v4/letter/b/45deac/32.png) [@Bob\_GV](https://community.electricforum.com/u/Bob_GV)\
**Post date:** [April 21, 2017, 8:38pm UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/5 "2017-04-21T20:38:36Z")

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It’s working again now. I’ll contact you if it craps out again.

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**Author:** ![Ramrod](https://avatars.discourse-cdn.com/v4/letter/r/58956e/32.png) [@Ramrod](https://community.electricforum.com/u/Ramrod)\
**Post date:** [June 29, 2017, 11:53pm UTC](https://community.electricforum.com/t/intermittent-dc-dc-converter/12283/6 "2017-06-29T23:53:48Z")

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My Indicator lights come on w/ brake pedal and all accessories stop working? Any ideas?