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Hemmings Motor News has been around since 1954. We're proud of our heritage, but we're also more than the Hemmings full of classifieds that your father subscribed to. Aside from new editorial content every month in Hemmings, we have three monthly magazines: Hemmings Muscle Machines, Hemmings Classic Car and Hemmings Sports and Exotic Car.

While our editors traverse the country to find the best content for those magazines, we find other oddities related to the old-car hobby that we really had no place for - until now. With this blog, we're giving you a behind-the-scenes look at what we see and what we do during the course of putting out some of the finest automotive magazines you'll ever read.

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Lucas Test Cards

Posted August 07, 2017 10:00 AM by dstrohl
Pathfinder Tags: classic auto DIY test card

Back in the 1960s, and possibly the early ’70s, Lucas Electric Limited of England issued these test cards to assist owners of British-built cars and trucks with any electrical problem they may encounter. Be it Lucas electrics, or Autolite, Delco, Bosch, and Magneti Marelli, all automotive electrical systems, regardless of where they are manufactured, do fail every now and then. Having these test cards on hand helped many car owners diagnose those problems.

I recently received these four Lucas Test Cards in the mail from Jeffrey Miller, the son of the previous owner of my 1967 Triumph GT6, who’d found them while cleaning out his father’s garage. Each test card measures 6-inches wide by 4.25-inches, and opens to a full 16.5-inches. Printed on stock similar in thickness to a postcard, they are coated to protect against dirty fingers while in use.

DIY throwbacks from before the time of the internet.

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Guru

Join Date: Jan 2008
Location: Tucson, AZ
Posts: 858
Good Answers: 22
#1

Re: Lucas Test Cards

08/07/2017 7:24 PM

Nice, but their POSITIVE ground devices don't work well here were everything is NEGATIVE ground (wink,wink).

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Power-User

Join Date: Jun 2006
Location: Rochester NY metro area
Posts: 220
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#2

Re: Lucas Test Cards

08/08/2017 5:41 AM

"Lucas, Prince of Darkness." Hell, they must have had a 52 card deck plus a couple of Jokers. I remember driving my Bugeye Sprite in the mid 70s was always an adventure. Especially in rain or humid weather. Now... a Painless Wiring Harness and a V6 and everything works.

jhammond

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Guru

Join Date: Jul 2012
Location: Madison, WI.
Posts: 1034
Good Answers: 45
#3

Re: Lucas Test Cards

08/08/2017 10:09 AM

It's been years since I set the dwell on a dual points system.

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Guru

Join Date: Jan 2008
Location: Tucson, AZ
Posts: 858
Good Answers: 22
#4
In reply to #3

Re: Lucas Test Cards

08/08/2017 11:28 AM

Yes, but give yourself lots of credit for even knowing what DWELL is, and more credit for having actually done it!

My 70½ 340 6BBL had dual points, but I quickly converted it to the MoPar electronic ignition so I didn't have to set dwell and timing any more.

My earlier '65 MG Midget was my first introduction to Lucas electrics...not fun.

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