Question about 1988 BMW K 100 RT

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Electrical problem,possibly relay?

BMW K100RS 1988.No Headlight, taillight or indicators.Starter mtr wont engage.Dash lights, brake light and park light work .Bike runs.Also no hazzards.Battery is charged.

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Check for busted fuse in the fusebox.

Posted on Sep 27, 2009

  • rolando ingking Sep 27, 2009

    You must also check the respective relay if this is okey.

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HAS BAD BRUSH CONTACT ON STARTER MOTOR K BIKES GROUND THE HEADLIGHT THRU THE POSATIVE STARTER MOTOR BRUSH,ALOT OF TIMES TAPPING THE STARTER MOTOR MAKES THE HEADLIGHT COME ON.MAY NEED TO CLEAN ARMATURE RINGS ON STARTER CARBONED UP BAD.,

Posted on Apr 05, 2013

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1 Answer

Taillights and dashboard lights went out on my 1988 Nissan Truck. Was told there is no seperate fuse for it. Thought it could be a relay or something. At a lost. Any help would be greatly appreciated.


There should be a 10amp fuse for the parking lights and a 5amp fuse for the dash lights. But both circuits go thru the headlight switch.
I would check for power in and out of the headlight switch on each circuit. You may need a shop manual or do some internet searching to get the complete diagram.

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Hi, Anonymous and the usual suspects are:
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Hi, Anonymous if your headlight is not working the first thing to check is the headlight bulb for damaged filaments then check your light circuit fuse, that being said the usual suspects are:
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2. Faulty hi/lo beam switch.
3. Faulty ignition switch.
4. Fuse is good but no continuity on both sides.
5. Faulty wiring between battery positive and headlight bulb socket.
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I have a 1993 VW Passat VR6, My problem is when I try to start it, I have no spark from the spark plugs..What could be the problem or how do I fix this?????


GO TO THIS SiTE TO CHECK THE FUSE BOX!
http://vwtech.no-ip.info/images/golf/post90.gif

This are the FUSE and RELAY number SLOT!
Fuse No. Description Ampere Rating 1 Headlight, low beam, left 10 2 Headlight, low beam, right 10 3 Instrument panel lights, license plate lights 10 4 Glove compartment light 15 5 Wiper/washer 15 6 Fresh air blower 16-valve only: Air conditioning 20 7 Taillights, side marker light, right 10 8 Taillights, side marker light, left 0 9 Rear window defogger 20 10 2.0 16-valve only: Fog lights 15 11 Headlight, high beam, left,High beam indicator light 10 12 Headlight, high beam, right 10 13 Horn 16-valve only: Radiator cooling fan 10 14 Back-up lights, washer nozzle heaters 10 15 2.0 16-valve only: Engine electronics, stabilizer valve, cold start valve 10 16 Instrument panel warning lights, 16-valve only: Multi function indicator 15 17 Emergency flasher switch, turn signals 10 18 Fuel pump, oxygen sensor heater 20 19 Radiator cooling fan, air conditioning 30 20 Brake lights, cruise control 10 21 Interior lights, digital clock 16-valve only: Luggage compartment light,multi function indicator, central locking 15 22 Radio, cigarette lighter 10
Relays Relay No. Description 1 Air conditioning 2 Open 3 Digifant control unit 4 Load reduction relay 5 Low coolant level control unit or Open 6 Emergency flashers 7 Rear Wiper 8 Intermittent wipers 9 Seat belt warning system control unit (possibly headlight warning too?) 10 Fog lights 11 Horn 12 Fuel pump (except diesel)Glow plugs (diesel) 13 Radiator cooling fan after run (except 16-valve)2.0 16-valve: Starter interlock relay 14 Automatic trans., coolant temperature indicator,starter interlock relay (except 2.0 16-valve)2.0 16-valve: Radiator cooling fan after run 15 ABS pump relay 16 ABS relay 17 Heated seat control unit, driver 18 Heated seat control unit, passenger, or power seat circuit breaker 19 Automatic transmission 20 Open 21 Power window relay, ABS hydraulic pump fuse 22 ABS valves fuse 23 Air conditioning, power seat fuse 24 Power window fuse

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1 Answer

I have a k100rs when i go to push the turn signals the hazard lights will come on when i beep horn the hazerds come on also the headlights dont work and starter wil not engage


is ur batt charged at 12.6volts--chec wiring for flaws n corrosion--alternator cud be bad also--du u hav a clymer shop manual?

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1 Answer

My cbr 954 rr headlight both high beam and low beam & high beam blue indicator light does not work ! no headlight at all ! taillights blinkers and gauge lights are good! is this just the fuse?


Yes - and there is a fuse for just those items. The other possible cause is a bad starter button. When you push the start button, it does two things: activates the electric starter - and cuts power to the headlight until the button is released. So, if it isn't the fuse, it's probably the start button.

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Hi and welcome to FixYa,

Initially, the click is significant as it indicates that the starter relay is engaging (hence the click) but the contacts are not switching (hence no starter spin). To confirm, temporarily jumper the 2 big terminals of the starter relay. To locate the starter relay, follow the cable from the battery's + terminal.

Offhand, no headlight would require tracing where the headlight +12 is missing using a testlight rather than a voltmeter.

Good luck and thank you for asking FixYa.

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1 Answer

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If the battery is in good shape and fully charged - and the headlight fuse is not blown, then I suspect that the starter button is at fault. The starter button does two things when you press it: engages the electrical circuit that causes the starter relay to trip, and, at the same time, cuts power to the headlight.

It could be that the contacts inside the handlebar mounted starter button are dirty. You can try spraying some electrical contact cleaner in there - but you are likely going to have to replace the whole right side handlebar switch assembly.

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Your battery is most likely the cause. The tail light and dash light do not draw much juice from the battery. However the headlight and starter are a different story. Are you absolutely sure you turned everything off before you took your break? If you are and you don't ride your bike a lot you should get a trickle charger for it. Use it when not riding. It will prevent you battery from completely losing it's charge thus protecting the battery.
If you do ride often then you should have the battery tested. You may need a new one. Remember that once a battery has been drained too low, permanent damage can occur.

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