Question about Kenwood Kdc-bt645u Car CD/ MP3 Player

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There is no sound at all what do we do, is the wiring bad or is the system faulty?

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I would say if its all wired up right then the radio is at fault.

Posted on Mar 16, 2011

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Sony stacking system LBTd505, the sound from the record deck suddenly went very faint. The cd and radio sections are fine. I have tried a new stylus, but no difference. Any ideas?


You have two options. First a faulty cartridge. Or a faulty pre-amp in the main amp.
You can find out if the cartridge (and amp) are playing up. By removing the connectors on the cartridge.
Then with the volume turned up to about half, with your finger, touch each one of the wires one at a time. It will not harm you at all. But you should hear a loud buzz on one wire on the right and a loud buzz on the left on another wire.
The two other wires will either produce a crackle, or a tiny buzz, or nothing at all.
If you do hear a loud buzz on two wires. The cartridge is faulty and needs replacing.
If you hear a slight buzz on them or weak sound. There is either a bad connection between the deck and amp. Or the pre-amp inside the deck which is only used by the record deck so will not effect any other function, is faulty.
You can remove the record deck connections to the amp and again with the amp on half full, touch the inputs with your finger. If you are not hearing a loud hum or buzz, the pre-amp is faulty. If you do the connectors are faulty.

Jun 11, 2016 | Sony Audio Players & Recorders

1 Answer

At idle sounds like bike loading up


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley... Good luck

Jan 27, 2014 | 2000 Harley Davidson FXDL Dyna Low Rider

1 Answer

Camper 12 volt system will not recharge.12 volt lights make low voltage alarm sound


most likely cause other than faulty wiring or bad ground is a faulty inverter. the specs should be taped to a panel near the unit or folded up nearby depending on the tech that installed the unit. use a voltmeter to confirm proper operating thresholds (if no spec sheet is present you can get one but contacting the manufactuer and providing a model number)

Oct 15, 2013 | Cars & Trucks

1 Answer

1994 HD 883 runs at idle but when your riding it surges then dies... But when it sits in idle sounds great and starts right up


Hi Anonymous, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
Good luck

Aug 05, 2013 | 2000 Harley Davidson XL 1200 S Sportster...

1 Answer

Running rough, backfire, hissing sound


Hi Anonymous, be sure to check your intake seals, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at BOTH ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor or intake seals.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust valve.
For a prime suspect please visit website below and good luck:
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Oct 15, 2012 | Harley Davidson FLSTC - FLSTCI Heritage...

1 Answer

1993 hd sportster. It runs and idles fine but when you drive 10anywhere or 15 miles it begins making a popping sound in front cylinder.


Hi Jctate55, and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connections at battery terminals,
ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system, carburetor or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose or dirty ignition module connector at crankcase.
13. Faulty MAP, CKP, and or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damage intake or exhaust vale.
For a prime suspect please visit website below and good luck:
Harley Davidson Wiring Diagrams and Schematics

Apr 18, 2012 | 2000 Harley Davidson XL 1200 C Sportster...

1 Answer

The check charging system comes on with a red battery


SOUND LIKE FAULTY ALTERNATOR. CHECK ALTERNATOR VOLTAGE OUTPUT AT BATTERY SHOULD BE 13.5 - 14.5 VOLTS. IF NOT ALTERNATOR IS FAULTY. CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR LOOSE CONNECTIONS OR DAMAGED WIRES,CHECK ALTERNATOR FUSE AND MAKE SURE DRIVE BELT NOT SLIPPING DUE TO BAD BELT TENSIONER. TURN OFF RADIO FIRST BEFORE REMOVING NEGATIVE BATTERY CABLE TO KEEP FROM LOCKING OUT RADIO.

Aug 06, 2011 | 2005 Mercury Montego

2 Answers

Not getting spark


need more info (need to know what type of ignition system your vehicle has: (1) traditional ignition coil /distributor system, or (2) electronic ignition, but lack of spark problems are usually a faulty coil
on traditional vehicles, and on the newer electronic ignition cars, total lack of spark would be
a faulty ECM (electronic control module) - partial lack of spark (diagnosed with a HEI (high energy ignition) spark tester kit), would be caused by a faulty coil pack (in the waste spark system), where
there's 1 coil pack for every 2 spark plugs.
I bought my HEI igntion testere kit for $20, but Harbor Freight sells a similar unit for $10.
Hope this helps.

Dec 27, 2010 | Ford F-250 Cars & Trucks

2 Answers

What cause sparkplugs not to fire


A
  1. Faulty coil/coil pack
  2. Faulty or corroded wiring
  3. Faulty spark plugs
  4. Faulty ECU
  5. No fuel in combustion chamber
  6. Faulty security system2_bing.gif, cutting ignition during operation.

Apr 30, 2010 | 1997 Dodge Intrepid

1 Answer

TEAC - CD-X9 - No sound in left speaker


the speaker wire itself could be grounding out. look for small knicks in the wire and make sure the plug is not faulty. RCA plugs can go bad which would account for intermitent troubles some times

Dec 28, 2007 | Teac CD-X9 Shelf System

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