converting from standard gauges to rallyes, can it be done with stock wiring har

[bugsydog]

i'm wanting to switch from standard gauges to rallye gauges (no tach) in my 74 charger and was wondering if i can use the factory wiring harness or do i need a new one to comply with plug-ins for alt/fuel/oil/etc.

[Ghoste]

What car?  Pretty sure the connectors are there but you will need to change the sending units.

[bugsydog]

sending units?

[Ghoste]

Your existing ones will be for warning lights, if you are switching to guages you'll need a different temp sender and oil pressure sender up at the engine.

[NHCharger]

When I converted my 72 to a Rallye dash I found that the standard cluster had a circuit board with a round pin connector that the gauge wiring harness plugged into. I just cut the wiring harness at the plug and wired it directly to the gaugesand lights. I don't remember changing the water temp sender. Did change the oil pressure sending unit.

[Nacho-RT74]

it can be done, BUT definitelly easier getting the propper harness ( including specific YEAR, specially being 74 )

of course oil sender needs to be changed