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May 29, 2020, 04:41:11 PM

Stereo problems

This is a discussion for the topic Stereo problems on the board Beach Buggy Electrical Help.

Author Topic: Stereo problems  (Read 292 times)

this user is offline leehumphrey

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on: August 05, 2019, 06:58:01 AM
Hi so just fitted a cd player/stereo to the buggy all works fine, until engine is running, then the radio looks like its on speed, display flashes on and off, radio power cycles rapidly, almost like its being fed AC,
buggy is a dynamo system, all other electrical items work fine, so now being feed directly form the battery, which has reduced the problem, but not cured it completely, suspect voltage regulator maybe.
Have put a test meter across battery, showing about 13.9 volts when engine running.
Any Ideas
Lee


this user is offline snoopy

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Reply #1 on: August 05, 2019, 07:48:16 AM
One for Dave dnd but 13.9volts is fine and you only get dc from the dynamo so would suspect a faulty unit, bad earth or picking up interference from the ht side of the ignition system.


this user is offline Dave DND

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Reply #2 on: August 05, 2019, 08:03:00 AM
What make and model of stereo?

 :-)Geek
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this user is offline leehumphrey

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Reply #3 on: August 05, 2019, 08:18:33 AM
Hi its a kenwood, not sure of the model number, just ordered an inline filter, and a ferrite clip on choke, to see if that cures it.
Lee


this user is offline Dave DND

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Reply #4 on: August 05, 2019, 08:23:34 AM
What model of Kenwood?
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this user is offline Dave DND

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Reply #5 on: August 05, 2019, 08:32:54 AM
Try the following and report back on any differences made:

Check Earth of stereo - must be good - try running earth wire direct to battery

Check battery to chassis earth (description / photo of earth locations would help)

Try touching an earth wire from the battery to the outer casing of the stereo

Does this problem decrease when volume is set at zero and increase when volume goes up?
If so, does problem go away when speakers disconnected?

Let me know and I`ll then advise what to try next  ;-)up



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this user is offline leehumphrey

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Reply #6 on: August 05, 2019, 09:27:45 AM
Hi ok, so uit is already wired direct to battery, and also case is earthed direct to battery,
volume makes no difference
disconnecting speakers makes no difference
no audible interference when on cd / radio or with usb stick

as radio has a iso plug put it into another car, to see if radio is faulty, other car is modern with alternator, and it works fine, so only thing I can think off is very ripple dc supply from dynamo ( faulty regulator ), or ht spikes on the DC suppy.
Lee


this user is offline Dave DND

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Reply #7 on: August 05, 2019, 09:37:11 AM
If you have access to a jump lead, connect from battery negative to engine block and then gearbox

Check ignition coil connections are right way round

99.9% certain your fault is with the car wiring and 100% certain that filer you ordered will make no difference
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this user is offline leehumphrey

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Reply #8 on: August 05, 2019, 12:00:17 PM
Hi ok thanks, just making up some new large earth ( bonding cables) for engine and gearbox,
Lee