chrism Posted December 13, 2007 Share Posted December 13, 2007 I've been looking for info on connection the original 75z tach to the RB20. Does anyone know where on this site that information might be. I looked everywere but all I found was how to hook up aftermarket tachs Thanks Quote Link to comment Share on other sites More sharing options...
chrism Posted December 13, 2007 Author Share Posted December 13, 2007 Ok, so I found that the factory tack uses +12v based on some of the threads on this site. I’ll have to look at the schematic and see if the RB20 tack signal is +12v. I don't have any way of measuring it. Some people have complained of causing damage to the ECU when making connections to the tack feed of the ECU. I don’t want to make that mistake so if someone is using the original tack with the RB20, please let me know how you connected it. I’m not really game for trial and error. Thanks Quote Link to comment Share on other sites More sharing options...
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