Hi folks,

I want to build in a navigation system in my 91' Accord Sedan. It's a DIN Radio with included navigation from Becker.
Now I read that the system requires a speed signal from tachometer. Does someone knows if there's a wire available which provides this signal? Or do I need an additional transmitter/sensor?

Maybe someone has already a navigation system in his 4th generation accord?

 

There should be a blue wire running from the distributor to the tach for RPMs.

 

Hmm, but I don't need the RPM signal, I need a kind of speed signal. (And I have a manual transmission).

 

Oh you wrote tach... um what does the navi manual say? I know that wire is just so it can tell if you're driving or not and I know there's a way of bypassing it.

 

The manual says that the system requires a speed signal from the speedo cable.
But this is a manual spindle in these old Accord models. But maybe there is a cable anywhere else which provides this signal.

 

As noted, it's likely just so that you can't operate the navi when you are driving ..... my Garmin just plugs into the lighter, so I doubt that the VSS is necessary for it to tell you where you are going.

 

Hmm OK, I understand what you meant.
But let's assume it's necessary, BECKER claimed that a navigation without speed signal is not possible.
The 91 Accord has a speed sensor in the transmission for speed based power steering. And additionally it has a electrical signal there.
Has anybody an idea what kind of signal this plug provides? And more important, which cable is the needed one?

I checked the service manual from Honda but couldn't find any troubleshooting on the speed sensor.

 

Have u Googled for a bypas unit for this model? When you hook this wire up, your going to lose certain functions while moving, it's a stupid safety feature. So your best option is to find a bypass code or a bypass unit, or you can work hard and hook this wire up only for it to mock you while you drive.

 

Yeah, I got a bypass unit off eBay for my touchscreen so I can watch dvd's while the car is in motion. Funny thing is....I've only ever had a dvd in there once. The day I put the stereo in! lol