Hazzard Switch
Hazzard Switch
Author
Discussion

Grady

Original Poster:

1,230 posts

281 months

Friday 14th April 2017
quotequote all
What are you using for a replacement 7 pin hazard switch (PRC4156)? I have two new in-the-box ones that apparently came with pre-broken broken white plastic contractors. I had a 3rd that I sent to a friend and he reported it was broken on arrival.

Ironically, the one in the car - that I think doesn't work because the indicators don't work - is the only intact one.

ETA - Even if they worked PRC4156 are no longer available. (Sorry about the extra Z in the title, I'm spoiled by spell check.)



Edited by Grady on Friday 14th April 18:08

Hayduke

98 posts

305 months

Friday 14th April 2017
quotequote all
If you have a good internal piece and it's installed correctly (contacts facing switch body, short arm to Pin 8), then maybe the spring action over Pin 7 isn't right. If that seems correct and you don't want to jumper Pin 6 to Pin 7 (at the back of the plug-in connector) - then Private Message me your mailing address and I'll send you an old switch body that's working for me.

Drew

adam quantrill

11,625 posts

263 months

Friday 14th April 2017
quotequote all
Grady the Hazzard switch operates the "dixie" air horn system (as fitted to all US Wedges) also it's obligatory to jump in through the windows when getting in the car.

Hayduke

98 posts

305 months

Friday 14th April 2017
quotequote all
your rocker looks like this white one?
absent that, there are two spring-loaded prongs in the switch lever. if these are missing, then there's not enough pressure to connect the flasher pin (6) to the ignition power pin (8), so no power to indicators.




Penelope Stopit

11,209 posts

130 months

Friday 14th April 2017
quotequote all
These switches or contact mechanism's can be found at many scrapyards throughout the world, they are a common switch

Hayduke

98 posts

305 months

Friday 14th April 2017
quotequote all
Well, they were once commonplace, but as Grady has found - age takes a toll. These have become, in USA at least, rather dear. In the US we've also found the nature of scrapyards has changed. You either have one nearby that caters to obscure makes, or you don't. Generally, you don't - and Lucas switchgear still qualifies as obscure here.

Should anyone back in TVR/Lucas home country have a spare, it would be Very welcome here. We can reciprocate with GM, Ford, or Chrysler stuff in some cases. smile

Penelope Stopit

11,209 posts

130 months

Friday 14th April 2017
quotequote all
Try emailing a UK supplier or scrapyard, these are a very common switch

v8s4me

7,266 posts

240 months

Friday 14th April 2017
quotequote all
The switches are from a Triumph TR7. I seem to recall many of these were exported to the USA (hence the ugly black bumpers). So maybe try searching for one of those in a breakers?

Rimmers stock a few switches. The hazard one isn't listed but maybe you could adapt one?

Or maybe THIS would help? There is a hazard switch on the plate.

Edited by v8s4me on Friday 14th April 22:47

Grady

Original Poster:

1,230 posts

281 months

Saturday 15th April 2017
quotequote all
Sorry, cooking Easter crawfish.

Hayduke - Yes, that is broken on both new switches. The extended arm breaks off to form a 2nd L shaped part. Looks like yours is cracked in the same place.

All - If you plug the part number into Google, every web site say "not available" or "discontinued". That was pretty much the situation in 2011 when I found and bought my "broken" new spares.

Scrap yards aren't much of an option as most older cars get crushed after a couple of days. And really, if a new in the box part fails (x3), I don't have much hope for a 35 year old part.

BTW- The TR7 hazard switches look the same but have one one or less pins. There is an old thread on this.

This is my Daisy Duke... Dixie Sue after a busy Good Friday



Edited by Grady on Saturday 15th April 00:35

mike various

236 posts

142 months

Sunday 16th April 2017
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Hi i had this problem on my 350 se when the hazard switch broke and the indicators wouldn't work.
I bought one for a tr7 from a company called ANG spares, they advertise on e bay or if you want here is the link

http://www.angclassiccarparts.co.uk/home/triumph-5...

To be honest i had to modify it by bending something inside ( the copper terminal ) but can't remember what i did !
But they now work ok.

Just a thought.

Mike

mrzigazaga

18,740 posts

186 months

Sunday 16th April 2017
quotequote all
Grady said:
She looks "Dog tired"...hehe...Easter Crawfish...Sounds better than a chocolate egg...smile

Cant promise anything but I might have a spare switch somewhere...Unless I have given them all away....


Grady

Original Poster:

1,230 posts

281 months

Sunday 16th April 2017
quotequote all
Thanks, but save your spare.

mrzigazaga

18,740 posts

186 months

Sunday 16th April 2017
quotequote all
Couldnt find it anyway...Hope you sort it....smile

Grady

Original Poster:

1,230 posts

281 months

Sunday 16th April 2017
quotequote all
I did! Hoping to resurrect some of the others,

KKson

3,466 posts

146 months

Monday 17th April 2017
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Despite some of the "experts" on this forum saying that they are a common switchs I've been looking for about 3 years for a new one both on ebay and several TR7 breakers but not managed to track one down. Mine works but the casing is missing and the switch is held together with duct tape and glue.

Mr Tank

5,797 posts

296 months

Tuesday 18th April 2017
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KKson said:
Despite some of the "experts" on this forum saying that they are a common switchs I've been looking for about 3 years for a new one both on ebay and several TR7 breakers but not managed to track one down. Mine works but the casing is missing and the switch is held together with duct tape and glue.
Hi Keith

If you want a replacement Hazzard switch. E-mail me direct and I will sort you one out.

Andy

v8s4me

7,266 posts

240 months

Tuesday 18th April 2017
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This is the inside of my Tasmin hazard switch.



Slightly different to your one with fewer pins and no little white thing. Hopefully you'll be able to find a direct replacement. If not then modifying another one shouldn't be too difficult even if it means you have to modify the connector block on the loom. Again, not difficult just fiddly.

I'm looking into a source of replica decals for the switch legends and symbols so if you're interested keep and eye on the Forum and I'll post the details one they are ready.

Here's an example of two of the replicas from the sample sheet....







Edited by v8s4me on Tuesday 18th April 08:18

Grady

Original Poster:

1,230 posts

281 months

Tuesday 18th April 2017
quotequote all
I checked with Rimmer and they don't have the 7 pin version and say they don't know of a substitute.

If it's easy to get to, what is the part number and how many pins?

I see some adapting in the years ahead.

KKson

3,466 posts

146 months

Tuesday 18th April 2017
quotequote all
Penelope Stopit said:
I did try these but they were out of stock and have been for over a year. The second switch is the headlamp switch - it has the right set of pins but didn't work. I also bought a Mini and Discovery hazard switch - both looked hopeful but neither actually worked as a direct replacement, so the wiring would need modifying to suit. Not the end of the world but I preferred to wait for an original TR7 unit to become available. Don't want all that hassle of crimp connectors!