Rear Lamp Cluster Earthing puzzle

[prlee]

Put the TR back together today for the summer.

I am puzzled - I refitted the rear lamps and they worked?

Ok, as far as I can see there is no earth from the lamp holders, there are black wires in the loom that seem to be connected to the lamp studs.

So I fitted the lamp units, did not connect any earth and all the lamps work.[:0]

Why? how are the lamps earthed?

Pete
81 Red DHC
79 Blue Spitfire

[nervousnewowner]

through the unit itself i think and through the connection to the body......something like that, as long as it works on a tr be happy...lol[:D]


the project at birth, watch it evolve...I hope...

[staningrimsby]

Dave's right if it aint broke then don't fix it.[:)]



1980 2.0 DHC (soon to be 16v) - Polly.

[DNK]

Run away, Run away!

Don
"No More Cars For You"
71 TR6- Perpetual remodel
80 TR7 V8 Kick in the pants

[jclay (RIP 2018)]

right in the middle of the tail light housing is a male electrical connector. That is where the single black wire attaches.

Clay

[url="http://web.mac.com/jclaythompson/Site/Welcome.html"]My Triumph Site[/url], [url="http://web.me.com/jclaythompson/Technical"]Technical Stuff[/url], [url="https://docs.google.com/?hl=en&tab=wo&authuser=0&pli=1#all"]Download Page[/url], [url="https://public.me.com/jclaythompson"]My Public Folder[/url], [url="http://web.me.com/jclaythompson/tr8/Welcome.html"]My TR8 Site[/url]

[prlee]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by staningrimsby</i>

Dave's right if it aint broke then don't fix it.[:)]
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Thats what I thought[8D]

Pete
81 Red DHC
79 Blue Spitfire

[prlee]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by jclay</i>

right in the middle of the tail light housing is a male electrical connector. That is where the single black wire attaches.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

I have noticed the stud and thats where the rear cruise lamps are earthed, the connectors on the loom are eyelets not spade so never went there, I thought they were for earthing the rear lamps but they worked anyway.

Might connect them together.

Pete
81 Red DHC
79 Blue Spitfire

[Odd]

The eyelet connectors are usually put between the nut and the washer on one of the cluster to body keeping fasteners...