TR7 relays

Here’s where to discuss anything specific about your standard(ish) car or something that applies to the model in general.
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TR7 relays

Postby oliviertr7 » 30 Apr 2018 13:00

Hello everyone.
by what did you replace the original lucas relays?
what brand?
what reference?

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Re: relays

Postby busheytrader » 30 Apr 2018 14:54


Rimmers use the original drawings from the TR7 parts book on their website. This webpage shows the diagram for the relays etc behind the dashboard.

I think the relay you're after is likely to be DRC1820 as that makes up 4 out of the 5 circular relays in the diagram but Rimmer Bros, S&S, Robsport, or James Paddock will know better. I've only had to replace one relay and that was over 15 years ago. Googling the part number might bring up an equivalent this Land Rover part.

Hope this helps

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Re: relays

Postby Cobber » 30 Apr 2018 18:00

I replace bloody Lucas relays with anything I can! :lol:
"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

'80 Triumph TR7, '73 Land Rover (Ford 351. V8),
'97 Ford Falcon Longreach 'S' ute,
'98 MG-F, '69 Ford F250.

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Re: relays

Postby Beans » 30 Apr 2018 18:46

I always nick the relays from old/butchered wiring looms that get thrown away.
So far in (nearly) 30 years of TR7 driving I had one relay fail (it was 25 years old at the time)...
I replaced it with an aftermarket Bosch item, which blew up almost immediately.
Since than I always carry a few 2nd hand Lucas spares :mrgreen: ...
1976 TR7 FHC (currently being restored ...)
1980 TR7 DHC (my first car, a.k.a. Kermette)
1981 TR7 FHC (Sprint engined a.k.a. 't Kreng)

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Re: relays

Postby saabfast » 30 Apr 2018 19:44

The only relay I have replaced was the starter relay which was shot when I bought the car - in 2006. It was pretty expensive for a relay but I could not get one anywhere except the known TR7 suppliers. Never had a problem with any of the others or that one since.
Last edited by saabfast on 30 Apr 2018 21:10, edited 1 time in total.
Saab 9-5 2.3t Vector Auto Estate Stage 1
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'81 TR7 DHC

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Re: relays

Postby Howard_B » 30 Apr 2018 20:15

The original triumph reference is UKC2416 (i.e. DRC1820)
The Rimmers replacement is DRC1820A

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TR7 relays

Postby oliviertr7 » 30 Apr 2018 21:50

thank you for your response, but I misunderstood my question.
I know it's the DRC1820, but I just wanted to know if we can replace it with contemporary basic.

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Re: TR7 relays

Postby FI Spyder » 01 May 2018 15:41

I took my 32 year old Lucas starter relay apart because I was having starter problems. It was like new inside, put it back together and put heat sink on it reseal it. That was 5 years ago still working like new (problem was loose battery clamp to big red wire connection). Lucas all the way. Replaced my Delco brake light switch with Lucas.
- - -TR7 Spider - - - 1978 Spitfire- - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - Yellow TCT

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