18 replies to this topic

[Jammy]

Right, I'm determined to get to the bottom of this.

Just for the purpose of tracking down the problem I'll run through how I think the hazard/indicator system works, and someone correct me if I get it wrong...

Power for the hazards comes in from fuse 1 (power for stuff that only works with ignition at position II) via the indicator flasher unit. With the hazards off, the power is allowed to go right through the hazard switch (along light green/brown trace wire) into the indicator stalk. Which should then operate the indicators as normal by closing the circuits along green/red trace or green/white trace wires. When closing one of the indicator circuits it completes the circuit, thus causing the indicator flasher unit to cut in, which interrupts the circuit by opening and closing the circuit constantly.

Switch the hazards on, power now comes in along a wire that (indirectly) comes straight from the starter solenoid. This is a brown wire from the solenoid, that feeds the ignition switch, then through a 15amp inline fuse and now becomes a purple/orange trace wire. This then feeds the interior light circuit and also goes into the hazard flasher unit. The power then feeds into the top four pins of the hazard switch, where it is distributed to both indicator circuits (green/red trace and green/white trace) and also the hazard switch light (which then goes on to earth). With the power now coming through the hazard flasher this then interrupts the power supply, causing the flashing. The indicator flasher shouldn't be doing anything because that circuit has been opened by the two upper pins not being connected in the hazard switch.

Right, my situation as it is now:
If I connect a wire around all four top pins of the hazard switch I get my hazards on. But only if I then switch on one side of indicators on the stalk, AND turn the ignition to position II.

Well this is logic for you. As soon as I had clear in my head the route through which power was going I was able to step through it with a mutlimeter!

With the ignition off
Checked for power at fuse 2. 12V
Checked for power going into inline fuse behind the carb. 12V
Check for power coming out of the inline fuse, yes, but fluctuating between nothing and 12V - I put this down to not being a great connectiono on the multimeter probe.
Power at hazard flasher unit. No

So I started looking at the wiring diagrahm, at which point the hazard flasher unit began ticking intermittedly! Turns out, because the wire coming out of the inline fuse is constantly stressed (and also a little correded) it wasn't giving a good connection. So, not having another spare inline fuse holder I hooked up a spare four fuse block, using one of the slots with a 15A fuse. And hey presto it all worked!!

The problem with the RH indicators not flashing but the LH working as normal was traced to a bad earth on the rear RH indicator!

So, for everyone who has their indicators working as normal, but their hazards don't work, check and double check the inline fuse, and the connections going in and coming out of it!!

[taffy1967]

Good to hear that you got it sorted jammy.



Now how about that MOT?

[MiNi FiZ]

sweet man, il do that on mine 2moro

thanks alot dude

[Jammy]

No worries dude. If you have a multimeter just check the pin into the hazard flasher unit. If it hasn't got 12V with the ignition off then chances are its something to do with that inline fuse.

Too late for the MOT now unfortunately, plus there is still a list of jobs left to do before that. I have Thursday, Friday and the weekend after I get back from BH2N to get them done before an MOT on the Monday.