Fuel Gauge Question

[smclaren]

Ahhh ... thanks Steve. Flasher unit, eh?

Yes, mine is currently swinging in the breeze below the dash (the flasher unit that is )

[SteveC]

now there are some trucks that have two...mine does..one for emergency flasher and one for the turn signals that is attached to the back of the instrument panel...

glad i could help

[Thunderfoot]

Not sure why it has the brown stuff on it unless it was put on to keep it from moving from vibration...

Didn't work then, did it ?

.... Nooo, they wear out over time and need tweaked back in if they can... They way they work is they send out a pulse instead of a constant voltage... The way they make this pulse is by using a bi-metal strip in them that heats up and cools down to make a contact. As it heats up it will bend away from making a contact (connection) and then it will cool down and bend back to make contact again... that adjustment changes the tension on the bi-metal strip as to how hot it has to get to bend away from the contact...
So as they get used and old the tension (strength) of the bi-metal strip weakens...
Hope that wasn't to confusing it is a little hard to explain but thought I would try.

FYI this is also how a flasher for the signals works as well...

like Steve said... That other round thing with the 2 prongs above it is the flasher for the turn signals.

[smclaren]

Great explaination Thunder.

Looks like you and SteveC have helped not only me, but a stack of other guys.

May be worth expanding the "fuel gauge technical tips" on the main site to include this issue, as it sounds really common.

Thanks again.

Steve

[ford4x4fun]

Good Info you learn something new every day!

[smclaren]

Hi SteveC and Thunderfoot

I just placed a HUGE order from NPD for a heap of 'stuff', included is a new IRVR #10804-2

I'll let you know how it goes.

Steve

[rjewkes]

wondering now Steve, if the bloomin' orange markers are something a previous owner mounted in to get the turns working?

[smclaren]

Hi rjewkes

I don't think so ? There is a requirement in Australia for vehicles to have Brake, Parking and Reverse lights (all served by the standard F100 tail lights - note our small insert lens in the tail light is white for reverse lights, where yours are amber/orange/yellow for turning lights), which meant a seperate turning light is needed and was installed by the factory.

Intersting though, I don't have hazzards !!!

Steve

[rjewkes]

all my lenses also have the clear square for backup.

they don't look bad your orange ones.