where is hazard relay ?

[Johnm0102]

tx Dave and Phil for pointers to Mk1-2 I posted earlier that it was ld38???? cant read other numbers under layers of paint! so its a full mk2 but obviously has bits which are not

[Philip Wardle]

Check the Commission number. Peter Robinson advocates that Mk2 started at LD20001. Some consider the LD20001 series to be Mk1.5 as they have the Mk1 shell with Mk2 interior and exterior trim. Full Mk2 from LD30001, when the new shell (doors/locks) emerged. This is when hazard lights were fitted, with a pull switch on the dash.

Yes, its definitely a Mk 1.5

[malc4d]

I had to add a neg wire to the LED indicator relay as it had three prongs and needed grounding to work. Did you find out why you have a neg. wire attached to the relay board ??

[richardthestag]

tx Dave and Phil for pointers to Mk1-2 I posted earlier that it was ld38???? cant read other numbers under layers of paint! so its a full mk2 but obviously has bits which are not

1976 is defo a full fat mk2, club registrar will be along shortly to slap anyone on the wrist for daring to suggest that a mk1 to mk2 transition stag be a mk1.5

sounds like someone has pulled the hazard relay from your relay board or it is faulty.

You can confirm this with a multimeter.

Disconnect the hazard plunger switch connector and find the light green wire with a pink tracer on the loom side of the connector (as opposed to the switch side of the connector) It should have battery voltage even with the ignition off. if it doesn't then the hazard unit is missing or broken from the relay panel. there may be a pair of taped up connectors, one purple and one light green/pink on the relay panel. Purple on the stag iirc is fed by the fused side of fuse no 1.

[Johnm0102]

thanks Richard did that - found no supply on ltGn/pink but fuse ok - then had a lateral thought - what if I put the old hazard relay back. hey presto hazard switch live and all indicators on - trouble is they don't flash. but it proves its not the circuit. now need to find a led hazard relay which works. Many many thanks for your patient explanations. (I struggled big time with the wiring diagrams - I mean I understand it takes a + and - on dc to fire a lamp or motor but why on the diagram does the hazard circuit trace back to the horn relay ARGGH im not cut out as an auto electrician and before Ive finsihed my moan why does the diagram show the hazard switch connector with 5 connections when in fact it has 6 !!!)

[richardthestag]

thanks Richard did that - found no supply on ltGn/pink but fuse ok - then had a lateral thought - what if I put the old hazard relay back. hey presto hazard switch live and all indicators on - trouble is they don't flash. but it proves its not the circuit. now need to find a led hazard relay which works. Many many thanks for your patient explanations. (I struggled big time with the wiring diagrams - I mean I understand it takes a + and - on dc to fire a lamp or motor but why on the diagram does the hazard circuit trace back to the horn relay ARGGH im not cut out as an auto electrician and before Ive finsihed my moan why does the diagram show the hazard switch connector with 5 connections when in fact it has 6 !!!)

3 are for the hazard circuit and 2 are for the indicator circuit, the last one is the earth for the flashing bulb in the hazard plunger.

Did you find the hazard relay on the relay panel behind the glove box yet or at least the wires that should go to it?

[Johnm0102]

richardthestag yes after I ascertained that the indicator flasher unit was hidden away nailed under lip of driver side dashboard (not attached to steering column) then it was clear that the one on the component panel behind the glove box was the hazard - this has a 3 pin socket but only two pins are wired.. The original hazard flasher unit which lights up all indicators and warning lamps is two pin . the led supplier had sent me 2 relays exactly same - (2 spade connections and earth wire ) the indicator relay works fine. Putting the other relay in place of the original hazard relay produces no current to the hazard switch (my amateur reading of the wiring diagrams make me assume that the positive current comes from fuse to relay then on to the hazard switch ??) so it looks to me either like the new relay is not correct or is DoA - I will try swapping with the indicator relay (they are both the same) and I know the indicator relay works. once again tx

[richardthestag]

richardthestag yes after I ascertained that the indicator flasher unit was hidden away nailed under lip of driver side dashboard (not attached to steering column) then it was clear that the one on the component panel behind the glove box was the hazard - this has a 3 pin socket but only two pins are wired.. The original hazard flasher unit which lights up all indicators and warning lamps is two pin . the led supplier had sent me 2 relays exactly same - (2 spade connections and earth wire ) the indicator relay works fine. Putting the other relay in place of the original hazard relay produces no current to the hazard switch (my amateur reading of the wiring diagrams make me assume that the positive current comes from fuse to relay then on to the hazard switch ??) so it looks to me either like the new relay is not correct or is DoA - I will try swapping with the indicator relay (they are both the same) and I know the indicator relay works. once again tx

3 pins on the led hazard relay, one has to be earthed. You need to make up a short lead to run from it to a suitable earth point. The relay will not work without an earth.

Next step is to swap the led flasher relays and see if the problem follows the relay

[Johnm0102]

sorry fo2 the nearly 2 week delay in responding - (Ive been in hospital for10 days and it wasnt all good). anyway I had a to-do list before i\ went in (when I could move around!!) and one was to check the earth on the hazard relay - I'd done that before I completely took parcel shelf out whe it was ok. but after the spade connector to earth had parted. hey presto the hazards worked when I sorted that. Last thing I did before the enforced lay off but thanks to richard et altera for helpful pointers. - Its going to be a few weeks yet befor eI can get on my back under the car and post more questions

[wilf]

GWS John.