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

 
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toecutter




Joined: 29 Jul 2012
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1992 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 16, 2017 5:07 pm    Post subject: [Mk2] [Turbo] '3.4W test bulb' specified in service manual for testing coolant gauge Reply with quote Reply with quote including images

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.
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markstevieandmads




Joined: 05 Aug 2013
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Location: Swindon, Wilts
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1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 16, 2017 6:13 pm    Post subject: Reply with quote Reply with quote including images

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.
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markstevieandmads




Joined: 05 Aug 2013
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Location: Swindon, Wilts
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1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 16, 2017 6:16 pm    Post subject: Reply with quote Reply with quote including images

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.
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