Another electrical question??

[lsutley]

Within the relay flasher assembly, there are three devices:

1. Flasher relay

2. Canceling unit

3. Starter circuit cut-off relay

 

I am curious as to the function of the starter cut-off relay and the cancelling unit?

Is the canceling unit just a timer that cancels the function of the flasher after a preset?

Is the starting cut-off relay an accumulation of the safety switches combined into one relay across the starting circuit?

 

The Cooper/Bussmann fuse block that is being install in my 86 has the option of powering ten relays and using forty fuses, in a very small space. Turn signal, SP/ST, SP/DT, timers, and a host of other configurations are available. I think you are now seeing what I may have in mind. All the devices, currently hidden under the fairing, could be relocated into one compact package, using modern solid state components.

 

As Jeff would say "while you're in there", why not go for broke!!

[Flyinfool]

The cancel unit is the tricky part.

It has 2 functions, one is just a timer that will cancel the turn signals after X seconds (15 I think), its second function is to monitor the speedometer to cancel the turn signals after 400 feet. The turn signal will not cancel until both the timer and the distance are satisfied.

 

The start relay and the flasher are easy to replace, It is the cancel part that you may have to build a small pic board for.

[lsutley]

Jeff,

 

Thanks for the information. I wondered what was the function of the speedometer sensor. If it is a simple pulse generator it may not be too dificult to duplicate.

 

The clutch switch and gear selector might also be used to latch in the timer. Neutral light not present and the clutch switch not made??

 

Thanks again

[dingy]

Jeff,

 

Thanks for the information. I wondered what was the function of the speedometer sensor. If it is a simple pulse generator it may not be too dificult to duplicate.

 

The clutch switch and gear selector might also be used to latch in the timer. Neutral light not present and the clutch switch not made??

 

Thanks again

 

The speedometer senor is located in the cluster over top of the speedo cable. speedo cable rotates a magnet which triggers a reed switch to count front wheel revolutions.

 

I have not dissected a starting relay yet, so I don't know how complicated they are inside. Have opened a fuel pump relay and it has a fairly complex circuit board in it for what it does.

 

Gary