I just bought this car and the previous owner gave me some history on it. They had replaced the engine at some point and the instrument cluster too. So I have no speedo or cruise and the "Sport" light is flashing. Codes pulled pointed strait to the VSS. The old one was very crusty so I replaced it. Still no joy. Checked the pins on the harness side and came up with the following:

Orange Wire = 5V with KOEO
Yellow Wire = 0V With KOEO (Should be 12 volts right?)
Black wire has good continuity to ground.

Which fuse supplies the 12V to the yellow wire? I checked all fuses, in the box under the hood, and all of them are good. Does anyone have a wiring diagram for the VSS and where it terminates to? Does the VSS get its 12V directly from the fuse block or is it switched through the ECM? If so which PIN?

I did a lot of searching through google and did not really find any results I trusted. Any help in the matter is greatly appreciated. Lastly if there is already a post on this, yes I searched (though my search terms may not have been correct), then please point me in that direction and I will most definitely get to reading!

Thanks in advance!

Kyle

 

The yellow wire gets power from under-dash Fuse No. 1 (10A) when the ignition switch is in the ON or START position.

The yellow wire runs through terminal no. 16, at Connector C407 which plugs into the back of the fuse box.

 

@Tech8 dude thank you so much. This helped me a ton. So now the plot thickens. I checked with a volt meter at the fuse block, in the cab, and the fuse has no power. I decided to check all 16 fuses and discovered there are several that are dead with the KOEO:

(BOLD ITALICIZED NUMBERS ARE DEAD)
*Edit: I do not have a proper fuse block diagram for my car. It did not have the cover for the fuse block when I purchased the car.*
Top row: 11 - 12 - 13 - 14 - 15 - 16
Mid row: -- -- 6 - 7 - 8 - 9 - 10
Low row ------ 1 - 2 - 3 - 4 - 5
**Edit: I located a fuse block diagram here: https://www.autogenius.info/27374/ :Could someone please verify if this is correct? If it is then all of the "dead" fuses are actually just spares and I am chasing a dead end LoL.**
I checked voltages at the fuse for all fuses under the hood, as well, but those all checked out.

Are all of these circuits fed from the same source? It seems to me like there is a dead relay or something of the sort.

Thanks again,

Kyle

P.S. I do not have any diagrams for this car. Can anyone recommend a good place where I can buy a complete set of diagrams for this car?

 

This image shows where the spare fuses are located.

 

The actual Fuse No. 1 would be "2" based in your numbering.

Do you have power at Fuse No. 1 with ignition in ON or START? If yes, then I will give you some info. to check downstream to the VSS.

 

The Honda Electrical Troubleshooting Manual (ETM) has electrical circuit diagrams.

https://www.ebay.com/itm/22257820227...oAAOSwiCRUcSqi

Service manual has some too; but, not in the same detail as the ETM.

 

@tech8
Given the diagram you provided, and the one I found earlier, then yes I have power to fuse number one. I pulled the fuse box away from the kick panel and was testing to see if I had power to the wire in the plug, from the earlier pictures you provided, and it appears that I do not. However I was rushed as I was trying to get it done before a big storm rolled in. I am NOT 100% sure of these findings yet. Once it dies down outside I will check again to make sure.

Yes I have power to the fuse both in KOEO and KOER
​​​​​​​

 

Fuse no. 1 feeds the yellow wire that goes to the VSS, check for power (with ignition in ON position, car not running) at Connector C127, terminal no. 2. Automatics have 6P connector and Manuals have a 3P connector there. If you have power at Connector C127, yellow wire, then the open (break) is between the wire going to the VSS harness connector.

 

@tech8

I thank you for all of the help you have given me so far. I look forward to checking all of this out tomorrow. The rest of today is a write-off due to bad weather. Also look for another thread from me in the near future where I will need more wiring help in relation to the third brake light and one of the trunk mounted brake lights.

Thanks again!

Kyle

 

Good morning! I checked power at C127 with KOEO and verified 12 volts. So you were correct in that the break is in the harness going under the engine to the other side. So I ran a jumper wire from C127 to the Connector on the other side and then verified voltage at the VSS plug, all good so far. I buttoned everything up and went for a test drive but I still do not have a working speedo. I pulled codes and still the PCM is reporting no signal from the VSS. In total I have 3 PCM codes and 2 TCM codes:

PCM: 12 - EGR Sensor
17 - VSS
41 - O2

TCM: 7 - Solenoid Valve A
8 - Solenoid Valve B

I will get to the other codes soon but the VSS is starting to work on my nerves. So now that I have known good +5, +12 and ground, to the VSS, what is the next step? Checking input the PCM yes? Also a quick question on the TCM codes... are the solenoid valves those two pots that are visible on the top of the transmission?

Thanks again!

Kyle

P.S. The EGR and O2 codes are next after I get the VSS going. The car came with a new O2 sensor that I have to install and the EGR I suspect just needs a new sensor( though I would to just do away with it all together)
PP.S. I uploaded a video of the code flashes. I am confident I read them right but here is the video for you to verify if you want:

 

So to update everyone on the VSS issue, it turns out the harness I was troubleshooting was the wrong one. My guess is when the previous owner replaced the engine he got the EGR and VSS plugs backwards. The VSS and speedometer now work beautifully. Can't say the same about the EGR. I will search the forums here for a fix. If I cannot find one then I will make a new thread.

Thanks again for all the help so far!

Kyle

 

You can buy new manuals from Helm(helminc.com). Buckle up for the prices!

You should be able to buy good condition used or reprints from eBay. I have found most CD manuals to be very poor.