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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Conrad325i on March 19, 2016, 12:48:40 AM

Title: Defies all logic....
Post by: Conrad325i on March 19, 2016, 12:48:40 AM
So my tail light wont light up.

I can take the bulb and put it on a 9V battery and it lights up.
I measure 8.75V across the 9V battery.
I then can measure 8.25V across the two wires for the tail light.
When i connect the bulb it wont light up.

Its a 5007 sylvania bulb.

And i know its not the connection because i can touch the two wires together and the BMU indicator will turn off.
Title: Re: Defies all logic....
Post by: Martin on March 19, 2016, 01:18:17 AM
Make sure the spring loaded base is pushing up and making contact. Try another globe. Or have you run over any Gypsies or black cats. :dunno
Regards Martin
Title: Re: Defies all logic....
Post by: Conrad325i on March 19, 2016, 02:17:42 AM
I think im going to buy a lower wattage bulb rated for lower volts and try again.

It was making good contact so idk.

And haha i think the house i live in is haunted, if that counts hahaha
Title: Re: Defies all logic....
Post by: Laitch on March 19, 2016, 07:59:40 AM
I think im going to buy a lower wattage bulb rated for lower volts and try again.

You've got the wrong bulb. You should have a 10W R10 or its equivalent in there. Don't go dimmer. Where did you get the 5007 spec?
Title: Re: Defies all logic....
Post by: Conrad325i on March 19, 2016, 10:56:44 AM
Honestly there wasnt an old bulb in there to begin with so i just bought one that looked like it would fit.
Title: Re: Defies all logic....
Post by: Conrad325i on March 19, 2016, 11:17:54 AM
Advance doesnt have an R10

Will a 63 or a 67 work?

7V,4.4W and 13.5V, 8W respectively.
Title: Re: Defies all logic....
Post by: Conrad325i on March 19, 2016, 11:43:07 AM
Tried both. Neither works.

This is just mind boggling. A light bulb is a light bulb. The only thing i can think of is that although we have a good potential difference across the connectors the wiring back there cant pass enough current to light the filament?
Title: Re: Defies all logic....
Post by: Chaos on March 19, 2016, 12:20:55 PM
if you are getting current at the socket, ground and pos, seem like it would be bad contact, try sanding the contacts and some dielectric grease.  Also check continuity through the bulb on the socket with the lights off.  I always thought the lights should be getting battery voltage, not the 8+ volts you mentioned.
Title: Re: Defies all logic....
Post by: TrueAce on March 19, 2016, 01:19:33 PM
10-4 with Chaos. Voltage ain't right.
Title: Re: Defies all logic....
Post by: K1300S on March 19, 2016, 01:54:55 PM
Tried both. Neither works.

This is just mind boggling. A light bulb is a light bulb. The only thing i can think of is that although we have a good potential difference across the connectors the wiring back there cant pass enough current to light the filament?

A bulb is not a bulb.  They all have different spec contacts.   You have to use the bulb the socket is designed for.

And there should be 12v in the socket.
Title: Re: Defies all logic....
Post by: Conrad325i on March 19, 2016, 09:59:42 PM
i dont think its inconcievable that there is a 30% voltage drop thru a few feet of 22ga wire.

Will someone go put a multimeter on thier bulb housing and tell me what you get?

Also as far as contact goes....
I crimped brand new connectors on the wires and then touched them to the bulb, circuventing the little bulb holder, and they still didnt light up.
Title: Re: Defies all logic....
Post by: johnny on March 19, 2016, 10:11:22 PM
gonna have to take it here so a certified technician can bill you book... (http://www.bmwmcchattanooga.com/)
Title: Re: Defies all logic....
Post by: Chaos on March 19, 2016, 11:19:14 PM
my 30 yr old K has 11.55V at the license plate light, 12.55 at the battery.  Are you close to a black hole that could be sucking away all the photons?
Title: Re: Defies all logic....
Post by: Laitch on March 19, 2016, 11:53:34 PM
Will someone go put a multimeter on thier bulb housing and tell me what you get?
I think the best way to work this is for you to get a multimeter (http://www.acehardware.com/product/index.jsp?productId=3099762&cp=2568443.2568454.2632224.1259271) and tell us what you get, Conrad. Start with the bulb socket and work your way through the wiring. You can get a wiring diagram from the one of the shop manuals in the Technical Library Card Catalog.

Another way would be to get one of these (http://www.amazon.com/Prayer-Cloth-Blessed-Rev-Ike/dp/B00TKS8P6O) and put in your request
Title: Re: Defies all logic....
Post by: Chaos on March 20, 2016, 12:26:04 AM

Another way would be to get one of these (http://www.amazon.com/Prayer-Cloth-Blessed-Rev-Ike/dp/B00TKS8P6O) and put in your request

that won't help with black holes


and I just lost all respect for Amazon
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 12:29:09 AM
O thou of little faith, wherefore didst thou doubt?
Title: Re: Defies all logic....
Post by: Chaos on March 20, 2016, 12:36:23 AM
my guardian bells trump you holy rags
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 12:37:29 AM
Pride goeth before a fall.
Title: Re: Defies all logic....
Post by: Conrad325i on March 20, 2016, 12:52:50 AM
Haha since i can see the multimeter is reading 8.25v at the bulb socket... The photons are all there, we have yet to rule out if the black hole is pulling the electrons back to the front of the bike thru the wire haha.

I guess ill deal with this tomorrow seeing as its gonna rain all day.

Also... Does anyone know who Opie's mom is on Andy Grifith? Did she die or what?
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 01:04:17 AM
since i can see the multimeter is reading 8.25v at the bulb socket
That's weak.
Title: Re: Defies all logic....
Post by: rbm on March 20, 2016, 01:59:50 AM
i dont think its inconcievable that there is a 30% voltage drop thru a few feet of 22ga wire.
small point but K100 wiring is 1.5mm generally, which is 16GA wire, not 22GA.  The voltage drop on 16GA wire over distances of 10-12 feet is minimal.
Title: Re: Defies all logic....
Post by: The Mighty Gryphon on March 20, 2016, 09:27:05 AM
I think Opie's mom was doing time in the North Carolina women's correctional facility in Mayberry for lewd and lascivious behavior.  I am pretty sure I saw a drive in movie back in the 70's based on her time there.
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 09:43:46 AM
I am pretty sure I saw a drive in movie back in the 70's based on her time there.
I saw it, too—They Lust In Stripes.
Title: Re: Defies all logic....
Post by: The Mighty Gryphon on March 20, 2016, 09:58:01 AM
Yeah, that's the one.  The obligatory mess hall riot scene was a classic.  Couldn't believe how easily the tops of those prison uniforms came apart.  :eek:  Not that I'm complaining...
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 10:01:32 AM
Opie's mom sure knew how to use her whittling shiv to back off that 300lb gang leader.
Title: Re: Defies all logic....
Post by: The Mighty Gryphon on March 20, 2016, 10:09:41 AM
She had a thing going on with her but the trouble started when she dumped the 300 pounder for that new inmate with the pointy bra and the really tight prison uniform. 

I never knew that spike heels were part of prison uniforms. 
Title: Re: Defies all logic....
Post by: Laitch on March 20, 2016, 10:14:33 AM
. . . she dumped the 300 pounder for that new inmate . . . 
That movie was ahead of its time dealing with sizeism, and the resentment and pain it causes.
Title: Re: Defies all logic....
Post by: Conrad325i on March 20, 2016, 11:00:12 AM
Wow guys. This forum is so enlightening. Lol
Title: Re: Defies all logic....
Post by: The Mighty Gryphon on March 20, 2016, 11:17:59 AM
You should have spent more time at the drive in back in the 60's and 70's.  Lots of good life information in those old movies.
Title: Re: Defies all logic....
Post by: Bill on March 20, 2016, 11:22:46 AM
And I thought the 'good life' information was found in the back seat at the drive in  :riding:  There was info on screen too ?
Title: Re: Defies all logic....
Post by: The Mighty Gryphon on March 20, 2016, 12:04:33 PM
Ummmm... as a matter of fact yes.  You should have come up for air once in while.
Title: Re: Defies all logic....
Post by: Martin on March 20, 2016, 04:01:54 PM
Really fella's you guys actually got movies at the Drive In, another OZ ripoff. Next thing you will be telling me you could get food & drink, & popcorn.
Pull the other one Martin.