Posted July 16, 200915 yr comment_289754 hey guys! i was wondering if anyone know where i can buy a replacement or how to rig my own Tach resistor (located on the passenger kick panel next to the fuse block the previous owner or whoever used pliers and tore it apart.. so yea please help thanks! -bee Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/ Share on other sites More sharing options...
July 17, 200915 yr comment_289808 I don't know the value of the resistor, but you should be able to buy a replacement at Radio Shack. If your connectors are trashed, you can wire in an inline fuse holder (for the plastic fuses with the tabs on the side, not the glass ones). Just bend back the resistor's leads in a loop, and insert into the fuse holder with a pair of pliers. Then put the rubber cap back over the top of the resistor. You can also get M and F 2-conductor Molex connectors at Radio Shack. Just build the resistor into one of the connectors.Do you have the old resistor? Can you read the color bands painted on it? Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289808 Share on other sites More sharing options...
July 17, 200915 yr comment_289826 I seem to remember that the tach resistor was 20KΩ 1/2W. Just be sure you use the correct type of resistor. The voltage pulse across this resistor can exceed 350V in amplitude. The replacement resistor must be pulse rated to handle 500V regardless of its power rating. Use a carbon composition (carbon comp) resistor if possible. This type of construction is well known to be able to handle high voltage pulses and this was the type that Nissan originally used. However, carbon comp resistors are getting more difficult to locate as very few resistor manufactures offer them anymore. A second choice would be a metal film resistor then maybe a metal oxide resistor. Avoid carbon film resistors for this type of application. Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289826 Share on other sites More sharing options...
July 18, 200915 yr Author comment_289857 Thanks for the 2 suggestions, i have to admit I am a rookie at electricals , so I am going to continue my search. If all else fails I am going to try my best to construct one. thanks again!-bee Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289857 Share on other sites More sharing options...
July 18, 200915 yr comment_289868 Just measured 2.175 k ohms on the resister of a 74 260 wire harness. Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289868 Share on other sites More sharing options...
July 19, 200915 yr comment_289920 Radio Shack doesn't carry too many resistors lately, so you would probably be better off going to a radio or TV repair shop. Maybe BD or MSA would have that. Edited July 19, 200915 yr by TomoHawk Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289920 Share on other sites More sharing options...
July 19, 200915 yr comment_289921 I confirm the 2.2K ohm value. Easy to find. 1/2 watt is plenty.Jim Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289921 Share on other sites More sharing options...
July 19, 200915 yr Author comment_289922 When I find the resistor, should I just splice in in-line? again I am no electrician http://www.radioshack.com/product/index.jsp?productId=2062325 i found this Edited July 19, 200915 yr by beebeecivic Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289922 Share on other sites More sharing options...
July 19, 200915 yr Author comment_289978 So i went out and bought the 2.2k 1/2 watt resistor and soldered it on and its still the same! but at least its more of a secure connections. Thanks guys! Link to comment https://www.classiczcars.com/forums/topic/32550-tach-resistor/#findComment-289978 Share on other sites More sharing options...
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