Trans troubles - no overdrive.
#21
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
If you are using a test light, then yes. And you will have to back-probe the connection. You likely will not be able to have this connector unhooked while also having the engine running.
#22
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
I checked for ground and got nothing. Will I have to drop the pan to check the range/ pressure switch, or can i check the wires at the PCM? Could there be a loose connection in the pan or is it more likely a bad switch?
#23
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
I checked and have power at plug connecting to trans (pink wire). If it has power to switch , is there anything else that could cause it not to work. Other than a bad switch.
#24
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
In the case of D4, Channel A should read open (no continuity to ground) and channels B & C should read closed (continuity to ground). This is with the engine running and the shifter placed into the appropriate position. These values are best monitored with a capable scan tool.
If all of the wiring checks out from the ECU (under the dash) to the range/pressure switch, then the switch is the most likely culprit.
If all of the wiring checks out from the ECU (under the dash) to the range/pressure switch, then the switch is the most likely culprit.
#25
![Default](https://blazerforum.com/forum/images/icons/icon1.gif)
Thanks to those that offered information and ideas. I finally went into the to check the pressure/range switch. i replaced the switch and wireing harness. Once together, shifted like a champ. Have all gears now.
Now on to the next item on the list to fix.
![Icon Banana](https://blazerforum.com/forum/images/smilies/icon_banana.gif)
Thread
Thread Starter
Forum
Replies
Last Post
Flatearthman
2nd Generation S-series (1995-2005) Tech
0
07-11-2012 06:53 PM
schreckman
Engine & Transmission
3
03-20-2009 09:27 AM
ironclad
Engine & Transmission
2
08-18-2008 04:05 PM
bblazer123
Engine & Transmission
3
01-06-2008 07:48 PM