Breva 750 dashboard maddness

[Hrvoje Kraljev]

Hello everybody
The thing is that my dashboard sometimes acts a little crazy...
Rev counter starts to jump like crazy showing approximately 7000-10000 rpm while engine is working between 2500-3000 rpm...also...when that happens the right side indicator stop working...left indicator working normally

Everything else works OK...

Any ideas where to look?
Thanks

 

[V700Steve]

You could disconnect the plug in back & clean all pins on both sides with contact cleaner, see if that helps.

Pin Designation Signal type
1 Right turn signal switch Digital input
2 Vehicle speed sensor power supply
Power output
3 Right turn signal switch Digital input
4 Dashboard power supply (+15) Power input
5 Engine speed signal Frequency input
6 Fuel level sensor signal Analog input
7
8 Fuel level sensor ground Analog input
9
10 Vehicle speed sensor power supply
Power output
11 Air temperature sensor ground Analog input
12 Vehicle speed sensor signal Frequency input
13 Air temperature sensor signal Analog input
14
15
16
17
18 Neutral gear indicator Digital input
19
20 Oil pressure sensor signal Digital input
21
22 Engine control unit fault signal Digital input
23
24
25 Dashboard power supply (ground) Power input
26 High beam indicator lamp control Power input
27 Dashboard power supply (+30) Power input
28 Left turn signal control Power output
29 Dashboard power supply (+30) Power input
30 Right turn signal control Power output

This is the pin-out for the plug on dash, Good Luck

 

[Hrvoje Kraljev]

According to your post the problem could be somewhere between pins 1-2-3...
Because...I see that at the same time when rev counter starts act crazy ...right indicators don't work anymore