well heres an update.... the tach quit reading rpm's all together the last race of the season..... so i got back to the shop and played around with it and wouldnt work. so now i was wondering if it was the tach or the box. i got a great deal on a new in box $300 tach
so i bought it and plugged the new tach in to my existing wires just to test and the rpm's were working..... plugged the old one back in and nothing ........ now it looks like i got a good paper weight :wink: