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Fusebox voltage?

  • Thread starter Thread starter terrylee
  • Start date Start date
T

terrylee

Guest
Ok did fusebox search got few ideas, but. I just got my bike charging right (last thread) ( so ordered a nice small volt meter off ebay from J+A Wholesale Suppy (round small Scorpion brand). so went to hook it up and decided to check volts from fusebox (i just replaced it with new spade type few months ago). I'm getting 12.8 at the main fuse on both sides (in and out) as well as the accessory fuse. But on ign., turn signals, and lights fuse I'm losing about a volt or volt and half (both in and out on fuse sides. Took headlight off and about the same losing a least a volt. All connections to fuse box are new and all have new fuses. I know you may lose a little but this seems way too much? also I want to hook up meter straight to battery, but without it being on all the time. Can I install a relay, and if so what goes where? I think I have some of it figured out but not completely. thanks in advance! terrylee:confused:
 
The only component between the main fuse (12.8v) and the other fuses (11.8v) is the ignition switch. I would suggest there is corrosion, high resistance in the switch causing a drop in voltage. Unplug the wiring going to the ignition switch and jumper the RED and ORANGE terminals together then check the voltage at the auxiliary fuses and if it comes up to the same voltage as the main fuse then your ignition switch could do with replacing.
 
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Thanks that did cross my mind, will try to do tomorrow and see what happens. Anyone have a idea how to hook up a relay to the volt meter (has only pos. and neg. wire)? terrylee
 
Using the typical relay that has terminals numbered 30, 85, 86 and 87, connect as follows:
#30 to your accessory fuse screw terminal (it's always 'hot')
#85 to the orange wire going into the fuse box
#86 to any good ground (there's a screw right next to the accessory fuse terminal)
#87 to your meter.
The ground wire on your meter can go to any ground, including the screw where the relay is grounded.

.
 
Terry I wouldn't worry about a relay, I'd just attach the positive leg of the volt meter to the switched side of the ignition switch inside the headlight housing and like Steve says "any earth will do", somewhere nearby. Lots of earth wires inside the headlight shell as well to splice to. Of course replace the ignition switch first otherwise you could be seeing a volt or two less than what the battery is really at.
 
If you want tO measure battery voltage measure acrOSS the battery. Do a coil relay mod and use that for the voltmeter. I put in a series switch. You can probably clean out the electrical contacts using naval jelly. Only the bottom of the ign switch is electical
 
I was going to hook up near headlight, but since volts were low, thought it would be better to direct to batt. to keep track of charging. I did spray some contact cleaner on and in the ign. switch last night and volts at fusebox came up about 1/2 volt from previous numbers. Will try to take ign. switch off and really clean it, if that doesn't work replace it. Never thought about the coil relay, already did that and think I have a spare #87 on that! terrylee
 
terrylee said:
I did spray some contact cleaner on and in the ign. switch last night and volts at fusebox came up about 1/2 volt from previous numbers. Will try to take ign. switch off and really clean it, if that doesn't work replace it.
Click to expand...
Keep in mind that you don't need to spray any cleaner down the keyhole.
noway.gif


That will only free up the tumlers in the lock.

What you need to clean are the electrical contacts that are under the lock portion. Remove the ignition lock assembly from the bike, and disconnect the 4-pin electrical connector that attaches it to the bike. Look on the bottom, you should see a few small screws that hold the bottom plate to the housing. BE VERY CAREFUL AS YOU REMOVE THE PLATE, there are springs and small parts in there. Once it is open, you should be able to see what needs to be cleaned, polished and lubricated.


terrylee said:
Never thought about the coil relay, already did that and think I have a spare #87 on that! terrylee
Click to expand...
LOOK VERY CAREFULLY AT THE RELAY. Some of them have two #87 terminals while others will have one #87 and one #87a.

If you do have two #87s, great. If you have an 87a, it won't work for your meter, you will have to install a "Y" or "T" adapter to the #87 terminal.

.
 
Thanks for the extra advise Steve, plan to take off ign. siwith this weekend and give it a good cleaning. Got the volt meter hooked up to the wife's 450 and works great through the coil relay. But still have to purchase a r/r for it ,plan to order one tonight. terrylee. PS will try to post pics. of meters when all done-I think they look great!
 
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