Quote:
Originally Posted by 300SDH
I have an 83 300SD. I am replacing the Tachometer. The instrument cluster I acquired used from the junk yard was from an 84 300SD.
The Tach from the 83 has 2 prong plug in and the 84 has a 3 prong plug in.
The 83 shows + and - the 84 shows + and ground and -.
Does anybody know if the the 84 tach version with the 3 prong can be used in the 83 prong plug and if so how.
Thanks for any help.
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I don't think it will work because the '84 (it's a California version) is controlled by a computer and uses a sensor at the flywheel, while the '83 is through the tach amplifier and uses a sensor at the crankshaft pulley up front.