• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

computer problems?


fordalltheway

New Member
Joined
Feb 13, 2009
Messages
9
Reaction score
0
Points
0
Vehicle Year
1999
Make / Model
ford
Transmission
Automatic
This morning I started my 1999 ranger v6 (3.8 I believe) and the ABS brake light was on. I drove it a little while and the transmission starting to shift poorly and the OD light started to flash. Next the check engine light came on and the speedometer went to 0 even though I was moving. The engine still ran normally though. Does this sound like the computer is fried? Maybe a fuse? Is there only one computer right on the center of the firewall with a big right angle connector? If I got a computer from a junk yard would I need to do anything or just plug it in and go?

Thanks in advance.
 


Rock Auto 5% Discount Code: 7FA902352B4C01: April 5th, 2021

Original_Ranger84

Active Member
TRS Banner 2012-2015
Joined
Aug 23, 2007
Messages
4,690
Reaction score
19
Points
38
Location
Homer, Ak/ Anchorage, AK/Fairbanks, AK
Vehicle Year
1984, 1999
Make / Model
Ford
Engine Size
2.8L, 3.0L
Transmission
Manual
Sounds to me like either the sensor or the ring in the rear axle went caput. The speedometer and the RABS are part of the same sensor that is located in the rear axle.

If it went out the ABS light would come on and the speedo would go out and that would trip the transmission and set off the check engine light.

Mine did the same thing except I have a manual transmission so it ran just fine but the ABS came on and the speedo would jump around a little. All I did was take the sensor out and clean it off and had to drain the wire protector cover because it was fill of water.
 

fordalltheway

New Member
Joined
Feb 13, 2009
Messages
9
Reaction score
0
Points
0
Vehicle Year
1999
Make / Model
ford
Transmission
Automatic
I didn't think about the rear axle sensor. The ABS light was on before I even moved. Would a bad sensor still cause the ABS light to come on even at rest? Of course the tachometer frozen at 3K as well.
 

Original_Ranger84

Active Member
TRS Banner 2012-2015
Joined
Aug 23, 2007
Messages
4,690
Reaction score
19
Points
38
Location
Homer, Ak/ Anchorage, AK/Fairbanks, AK
Vehicle Year
1984, 1999
Make / Model
Ford
Engine Size
2.8L, 3.0L
Transmission
Manual
I wouldn't know but i does sound like somethings mesed up, I don't think the tach has anything to do with the ABS but I would still start with that sensor as its easy to pull and clean and cheaper to replace then anything else.

Also stop by a parts store and borrow a code reader and see if you can't figure out if its something else.
 

fordalltheway

New Member
Joined
Feb 13, 2009
Messages
9
Reaction score
0
Points
0
Vehicle Year
1999
Make / Model
ford
Transmission
Automatic
You sir were 100% correct. Got a new speed sensor and in about 5 minutes all the little lights went off and it drives normally again. That was the entire problem. I was thinking the worst. I guess the PCM was confused becuase it didn't know how fast it was going.

Thanks a bunch!!!!!
 


Top