Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

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Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby Fred Average » Thu Mar 20, 2014 6:44 pm

Hi :o ....1992 D250,360V8,Auto,2WD.
54K miles,virgin unmolested or modified box stock vehicle.
Dry climate,no visible issues.
Problems:
1."Check Engine" light comes on sporadically. Turn off the ignition,restart the truck,75% of the time it goes out?

2.Speedometer usually works,sometimes just speedometer but NOT the odometer?
Currently they are both working.
Is it electric or cable driven?
Didn't see a "mechanical" cable/hook up under the truck.

3.Radio rarely will come on,now not at all?

:roll:
Any and ALL help appreciated...:-)
Thank You.
Fred Average
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby ellis93 » Fri Mar 21, 2014 4:27 am

I'd say the Speedo head is bad,if the needle is moving the odometer should be moving. It should be all electronic.

The radio thing is very questionable and I don't have any good pointers for that. It's possible that the 22 yr old radio has just ran it's course and died.


Oh yeah,engine light thing...who knows without pulling the code(s).
Most of the early mopar computer systems are rudimentary (most mopar friendly description of total schit I can come up with/it is only bested by ford in the turd diagnostics department) and you'll have to have the light on to pull the code as the malfunction is happening.
93 D250 ,5 speed,4.11s,k&n autometer tach pyro trans boost guages,GDS 60mm h1c 14cm,honed 5x10,hplp/reg,1/8 timing,M+H M2 fuel pin, tims cooler tubz
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby DodgeFreak » Fri Mar 21, 2014 5:16 am

Radio is taking a crap, I don't know how many radios I've replaced because they won't turn on. I would check connections, fuses and add grounds and then replace the radio, anymore if a radio doesn't work I pull it out, toss it and install a different one.

how does the truck run??? If it runs good, gets decent mileage. Just run it with the light. It's a sensor close to failing that you won't be able to find until it fails completely....which I've had some fail with in a week of the light coming and going, and I've drove some where the light would come and go for a year.
92 D350 Cab and Chassis. Auto stock, wiring gremlins. 330k miles
92 W250 Ext cab rotted completely out. Auto, pump maxed, 215 ppump nozzles, Denny T2 pin.
85 D350 single wheel, converted to cummins, getrag, turned up 2 turns and afc screw flush.
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby Fred Average » Sat Mar 22, 2014 7:18 am

Thank You All for the great info and input :salut:
Yes,the truck runs GREAT as according to the gauges,runs cool,oil pressure good,charging system good .
I've found someone who can diagnose the codes for the "Check Engine" light.
Fred Average
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby Fred Average » Thu Mar 27, 2014 8:15 am

Hi,and again thanks for the input.
I've discovered that when I reset the trip odometer,it sometimes disables the odometers & they stop working,but the speedometer still does. Is this electrical or mechanical related as sometime after a while, as the truck is driven,the odometer magically starts working again. :roll:
Fred Average
fuel screw!!!!
 
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby Fred Average » Tue Apr 08, 2014 6:20 pm

Well good news... Somewhat! :shock:

Went out to drive to work today after not driving the truck for 4 days & the radio worked!

Did nothing to affect this,but start the truck up!

Later in the day after doing errands,then only the digital clock in the radio worked,but no radio!?

Then after shutting the truck off and restarting it,radio worked?!

I'm guessing it's a grounding issue...?


Anyone eles have these symptoms and find the "cure"?

Thank You :lol:
Fred Average
fuel screw!!!!
 
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby DodgeFreak » Wed Apr 09, 2014 5:11 am

Yes in my intrepid....I replaced the radio.
92 D350 Cab and Chassis. Auto stock, wiring gremlins. 330k miles
92 W250 Ext cab rotted completely out. Auto, pump maxed, 215 ppump nozzles, Denny T2 pin.
85 D350 single wheel, converted to cummins, getrag, turned up 2 turns and afc screw flush.
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Re: Speedo/Radio/Check Engine Light Sporadic On~Off~Works Issues

Postby Fred Average » Sun Apr 13, 2014 11:07 am

The Speedo issue was/is the VSS device on the trans .

The GOOD NAPA replacement part number is VSS100.

NAPA offers 2,get the/this NAPA ECHLIN one :lol:
Fred Average
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