Floating Versus Chassis Tied Light Relays In Off Position

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kellogs

Member - Posts: 6

Joined: August 17, 2021

Location: West Virginia, United States

Posted: June 03, 2023 at 5:35 AM / IP Logged

For any vehicle, am I guaranteed to have a chassis connection on the + side of a light bulb when it is *not* lit ?

I am particularly interested in the rear turn/brake light bulb.

Thanks

i am an idiot

Platinum - Posts: 13,693

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: June 03, 2023 at 7:41 PM / IP Logged

LED lamps not necessarily. Incandescent lamps, it will be very close to ground (Through the element(s) of the bulbs attached to the wire.

Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

kellogs

Member - Posts: 6

Joined: August 17, 2021

Location: West Virginia, United States

Posted: June 24, 2023 at 6:58 PM / IP Logged

Just to clarify, I was referring to the GND connection marked "??". Is that "terminal" always grounded or can it also be left floating?

Thanks

Floating Versus Chassis Tied Light Relays In Off Position - Last Post -- posted image.

Ween

Platinum - Posts: 1,368

Joined: August 01, 2004

Location: Illinois, United States

Posted: June 25, 2023 at 6:17 PM / IP Logged

It can be left floating. Chrysler at one time wired their parking light relays with the 87a terminal grounded.

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