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Author Topic: No power to CB750K6  (Read 1747 times)

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Offline Ike

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No power to CB750K6
« on: May 04, 2016, 05:58:12 PM »
I was off and on my CB750-K6 all day with no problems. I came home from work and parked it. When I got back on it this evening, no power. The dash lights, horn, starter, etc. would not work. The battery still had a full charge and the 3 fuses on the left side seemed fine. Any suggestions? 
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Offline Stev-o

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Re: No power to CB750K6
« Reply #1 on: May 04, 2016, 07:05:48 PM »
..."fuses seemed fine" is not a proper way to diagnose.
Check them with an ohmmeter.
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Offline b52bombardier1

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Re: No power to CB750K6
« Reply #2 on: May 04, 2016, 07:07:41 PM »
And I would get the battery "load tested" at an auto parts store - usually a free service.  It is possible that it can't deliver the amps anymore and its worn out.

Rick
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Offline goldarrow

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Re: No power to CB750K6
« Reply #3 on: May 04, 2016, 07:14:05 PM »
Quote from: Stev-o on May 04, 2016, 07:05:48 PM
..."fuses seemed fine" is not a proper way to diagnose.
Check them with an ohmmeter.

+1

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Offline mystic_1

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Re: No power to CB750K6
« Reply #4 on: May 04, 2016, 07:24:56 PM »
At minimum, pop them out and swap them with some from the spare cache of fuses-that-you-always-carry-with-you-because-it-would-be-dumb-to-be-stranded-by-something-so-small.

;)

Another thing to check would be the key switch.  Check for power on RED, then switch it on and check for power on BLACK.

mystic_1
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Offline ekpent

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Re: No power to CB750K6
« Reply #5 on: May 04, 2016, 07:28:12 PM »
 Start checking all electrical connections if the fuse checks out and check the old fuse box also . I once was let down for awhile because my ignition switch connector under the gas tank became disconnected mostly because I has the switch located with an aftermarket bracket up by the handlebars. Probably a simple fix when you trace it down. 
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Offline Frostyboy

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Re: No power to CB750K6
« Reply #6 on: May 05, 2016, 06:03:59 AM »
Be sure to check the earth cable to frame connection as well.
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Offline flybox1

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Re: No power to CB750K6
« Reply #7 on: May 05, 2016, 07:14:31 AM »
..and the block connectors that can part ways for no reason at all  ::)
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Offline Ike

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Re: No power to CB750K6
« Reply #8 on: May 06, 2016, 11:11:14 AM »
I got it! It was the 20A fuse. It showed good on the meter but only intermittently. I changed it and all's well. Thanks all.

Ike
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Offline Stev-o

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Re: No power to CB750K6
« Reply #9 on: May 06, 2016, 02:11:19 PM »
Good!   I'd clean the fuse holder to prevent further issues. Emery cloth works well.
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline oldhatt45

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Re: No power to CB750K6
« Reply #10 on: May 07, 2016, 07:14:15 AM »
Ike,
Unless you want to keep the K6 absolutely stock, I would suggest you give some thought to the Hondaman Fuse Box.
It is a plug and play replacement of the old style glass fuses with the new blade style fuses.

I can't find the link right now, but I'm sure if you PM Hondaman, he can provide the info you need.

Charlie
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Offline zammykoo

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Re: No power to CB750K6
« Reply #11 on: May 07, 2016, 07:23:05 AM »
Check your grounds, maybe a loose ground connection somewhere near the battery.
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Offline Eydugstr

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Re: No power to CB750K6
« Reply #12 on: May 07, 2016, 01:16:47 PM »
Quote from: oldhatt45 on May 07, 2016, 07:14:15 AM
Ike,
Unless you want to keep the K6 absolutely stock, I would suggest you give some thought to the Hondaman Fuse Box.
It is a plug and play replacement of the old style glass fuses with the new blade style fuses.

I can't find the link right now, but I'm sure if you PM Hondaman, he can provide the info you need.

Charlie


+1.  The original fuseholders weren't made to last 40+ years, not too mention it's easier to find the modern blade style fuses.  Here's a link - http://sohc4shop.com/catalog/product_info.php?cPath=23&products_id=48
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