[Mk2] [Turbo] '3.4W test bulb' specified in service manual for testing coolant gauge

[toecutter]

I want to test the operation of my coolant gauge. The service manual covers this on page BE-55.

It specifies a '3.4W test bulb' to be used in the procedure (ground the harness connector through the bulb and the gauge should show hot).

Does it have to be exactly 3.4W? Tried a parts place and they didn't have any.

[markstevieandmads]

Should be able to work out what resistor is needed instead of a bulb.
All i can remember is v=ir which is currentxresistance =voltage. In this case it doesnt help lol

Shinny is an electrical genius so im sure he be around to tell you.

[markstevieandmads]

Just used an online calculator that does ohms law and putting in 12v and 3.4watts it equates to a 43ohm resistor?
Not sure if thats right tho.