Dash not indicating when transmission is in park or neutral

As it turns out a couple things of concern. First either my memory or the memory of the gentleman who was helping me get started reveals a bit of a lapse - critical albeit. Lol. One of us dion nectar two electrical plugs on driver's side of dash (behind a pear shaped panel wherein electrical on nectar and fuses are located). Once I made that discovery and performed the subsequent reconnecting of said cables all was right with the Honda world. Dash indicators worked, car started and ran!

However, the second issue is of greater concern. In the process of diagnosing the issue a check of the transmission end of the shift cable (again a V6 3.0 w-another 4 speed transmission) confirmed my recollection that the cable was completely mechanical. No electronic sensing device present. My assumption at that point was the position sensing device must be in the passenger compartment attached in some fashion to the shifter/cable.

I reviewed parts listing for a Honda 2000 Accord V6 auto transmission and sure enough the only part listing I could find showed it to be located -as you indicated - at the end of the cable beneath a cover fastened to transmission by three bolts. Hmm.
Further review of online info including YouTube video revealed same thing you described.

For the record what do you think is going on? We have owned the car for 10 years no wrecks no engine/transmission changes. Why the obvious radical difference -admittedly the car is and was functioning properly. Mid-year change over? I can't find reference to it anywhere.

I know 2009 Accord had a mid-year change over with the rear brakes being changed to those used on 2010 model. Although parts books don't all reflect that possibility. (We have one, I learned when I Changed brakes.)

Two points for your future client related problem questions:

- if/when no Park / Neutral dash indicator yet other dash indicators work/light there are (3) possibilities: blown lights - unlikely if more than one not lit; more than one light out may indicate probable electrical issue - ie. Plug loose/disconnected (as you noted) or position sensor bad;

- in event D4 indicator is flashing that is the equivalent of the "check engine" warning indicator - in this case either open circuit - connector unplugged OR as I believe is also possibly true, flashing may also indicate position sensor detects a 'miss-aligned' sensor (incorrectly replaced on shafts not corresponding to ECU/TCS expectations) need to remove & remount so position indicator reflect transmission gear shaft's actual position.

- FYI for those who don't already know (I didn't) a flashing dash gear indicator supposedly is a warning of a transmission issue/problem including, but not limited to a "low transmission fluid" condition - according to what I have just learned.

According to what I found in the process of my search/diagnosis at least two other possibilities exist: bad ignition switch & the key's ID chip is bad or ECU may need to be resync'd with the key to permit key to start car.

Is any of this accurate?

Any idea's why my 2000 Accord V6 does not have transmission gear sensor located at transmission end of shifter cable?