lowman10 
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Bike: 1991 Honda Nighthawk 750
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« on: March 03, 2011, 11:18:28 PM » |
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ok got another question the brake light on my 1991 nighthawk 750 will not work light bulbs are ok i got power from the brake light switch, the tail lights work but when you push the brake lever down the brake light won't come on any help on what is going on?????????
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Bumblebee
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Bike: 1982 CB650
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« Reply #1 on: March 03, 2011, 11:35:36 PM » |
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Follow the volts.
The brake switch works so:
Is there power to the brake portion of the brake light socket?
Is the bulb seated properly with a good electrical connection?
Is the brake light filament onthe light bulb operating?
Good solid ground connection? (yes, the connection can be good enough to operate the running light however not good enough to handle the brake light)
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You can't get lost if you don't know where you're going.
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lowman10
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« Reply #2 on: March 06, 2011, 04:08:41 PM » |
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As best as i can tell looks like no power to the brake light part of the bulb so does this say that there is a wire broke somewhere in the line?
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coffee_brake
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« Reply #3 on: March 06, 2011, 04:18:24 PM » |
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The switch is adjustable.
If you pull the plunger on the switch by hand, does that make the light work? If so, then you probably just need to turn the nut-looking part of it so that the pedal makes the plunger come out far enough to activate the light.
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lowman10
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« Reply #4 on: March 07, 2011, 10:58:14 PM » |
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I have did that too still no brake light even tried a new switch so close but still no brake light  |
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coffee_brake
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Jenn in "Jaw-Juh"
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« Reply #5 on: March 08, 2011, 04:57:45 AM » |
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Have you removed the seat and checked the connectors back there? They're the old-school type and don't lock in. The Clymers or Honda manual will have the wiring diagram so you will know what color you're looking for back there....
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chromy
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« Reply #6 on: March 08, 2011, 06:18:18 PM » |
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Did you try both brake lever and brake pedal?
If I recall correctly (from working DrDubb's brake light) the switch provides the ground to complete the circuit to power the light.
If both pedal and lever do not light the brake, then you're chasing the source side of the circuit.
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"Eric"
Virginia Beach, VA
1983 CB650SC
2007 ST1300A7
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lowman10
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« Reply #7 on: March 08, 2011, 11:28:23 PM » |
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i think the problem is in the front lever i think my son said he had someone mess with the front lever and anyone know where the switch is on the front lever??  |
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lowman10
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« Reply #8 on: March 08, 2011, 11:30:00 PM » |
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and the front lever will not make the brake light come on ?? |
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Tryvelcro
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« Reply #9 on: March 08, 2011, 11:52:44 PM » |
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Is there a wire plugged into the right switch housing? Like, the underside of it, iirc.
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coffee_brake
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« Reply #10 on: March 09, 2011, 04:16:58 AM » |
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Yes, at the right switch housing you'll see two wires coming off. They should be connected to two little metal prongs that stick off the bottom. When you move the lever, look closely under there and you'll see the brake light switch, made into the place where the lever pushes a button. The prongs are right there.
This might have nothing to do with the rear brake...
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drdubb
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« Reply #11 on: March 09, 2011, 06:15:23 AM » |
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Did you try both brake lever and brake pedal?
If I recall correctly (from working DrDubb's brake light) the switch provides the ground to complete the circuit to power the light.
If both pedal and lever do not light the brake, then you're chasing the source side of the circuit.
My problem was actually the tail light, not the brake light. Ended up being the flasher. It was causing an intermittent short. |
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chromy
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« Reply #12 on: March 09, 2011, 06:20:41 AM » |
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Did you try both brake lever and brake pedal?
If I recall correctly (from working DrDubb's brake light) the switch provides the ground to complete the circuit to power the light.
If both pedal and lever do not light the brake, then you're chasing the source side of the circuit.
My problem was actually the tail light, not the brake light. Ended up being the flasher. It was causing an intermittent short. Sorry DrDubb, I was thinking about the time at the rally when your brake light was not working. |
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"Eric"
Virginia Beach, VA
1983 CB650SC
2007 ST1300A7
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drdubb
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« Reply #13 on: March 09, 2011, 06:24:58 AM » |
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Chromy....the short was in the tachometer that I crushed. We disconnected that and then had to readjust the foot brake switch. By the way, I carry a full complement of fuses now.
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Dance as if no one is looking.
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chromy
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« Reply #14 on: March 09, 2011, 06:30:06 AM » |
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and the front lever will not make the brake light come on ?? CB and TV are spot on. A good chance is the connections need cleaned, the micro switch needs cleaned and exercised, or it is physically damaged and needs replaced. You can jumper the two wires together to see if the brake light comes on. 1. If after jumpering the wires together the light comes on, it is the micro switch that is your culprit. 2. If the light does not come on, then you've got more wire chasing to do. |
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"Eric"
Virginia Beach, VA
1983 CB650SC
2007 ST1300A7
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hppants
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« Reply #15 on: March 09, 2011, 11:07:11 AM » |
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FYI - if the problem ends up being the front brake micro-switch, then the Honda Dealer can get the part and its like $6.00 or something real cheap. I bought one last year for my 700 and that part number fits all kinds of CB's
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2005 FJR1300
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lowman10
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« Reply #16 on: March 09, 2011, 12:14:16 PM » |
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do the turn signals front and rear need to be hooked up to make the brake light work? The 1991 NH 750 i am restoring does not have the signals hooked up yet  |
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ExTex
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« Reply #17 on: March 09, 2011, 01:01:18 PM » |
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The turn signal circuit is entirely separate from the brake light cuicuit.
Ride safely,
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1983 CB650sc
1989 VTR 250
1985 VF700s..Sold
1983 VT500c..Sold
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lowman10
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« Reply #18 on: March 12, 2011, 07:08:31 PM » |
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ok here is the problem now on the brake light both the brake light and tail light is on at same time? any ideas?  |
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drdubb
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« Reply #19 on: March 12, 2011, 08:10:17 PM » |
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Check the adjustment of the rear brake light switch.
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Dance as if no one is looking.
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