348 rev counter on my 348

justininaz · 09-08-2011, 09:34 AM

I have a 1989 348, been in climate storage since new and went to drive it the other day, and the rev counter isnt working?

Any ideas? my car only has 12k miles. Could it be a bad ground or connection? Battery was recently changed, so wondering if a ground issue?

Thanks!

Justin

Saint Bastage · 09-08-2011, 10:45 AM

Places to look
1) check the connections on the back of the gauge
2) check the 5/8 crank sensor. The black lead is supposedly the tach input wire
3) check around the 5/8 ECU. I've heard stories about fuses being located there but they were on spiders.

After these your probably down to tracing wires looking for a short. I doubt a battery ground issue would show up in the tach only.

Magnum6464 · 09-08-2011, 05:18 PM

Just keep driving it, it will start working again. Electricals are weird that way when not used for a long period of time.

~

Mario

09-08-2011, 09:34 AM	#1
justininaz Join Date: Sep 2011 Location: Chandler, AZ Ferrari Life Posts: 1 Name: Justin	rev counter on my 348 I have a 1989 348, been in climate storage since new and went to drive it the other day, and the rev counter isnt working? Any ideas? my car only has 12k miles. Could it be a bad ground or connection? Battery was recently changed, so wondering if a ground issue? Thanks! Justin

09-08-2011, 10:45 AM	#2
Saint Bastage Owner Elite Member Join Date: Jun 2007 Location: Essex Connecticut Ferrari Life Posts: 1,679 Name: Lane	Places to look 1) check the connections on the back of the gauge 2) check the 5/8 crank sensor. The black lead is supposedly the tach input wire 3) check around the 5/8 ECU. I've heard stories about fuses being located there but they were on spiders. After these your probably down to tracing wires looking for a short. I doubt a battery ground issue would show up in the tach only. Lane 348ts SS #64, Nero on Nero

09-08-2011, 05:18 PM	#3
Magnum6464 Owner Elite Member Join Date: Jul 2005 Location: Quebec, Canada Ferrari Life Posts: 1,696	Just keep driving it, it will start working again. Electricals are weird that way when not used for a long period of time. ~ Mario 1990 348 TS (87284) “I build cars for young men that only old men can afford” - Enzo Ferrari

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