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loss of guages volvo

I have an 03 volvo purchased about a year ago from a friend I have had this truck to volvo twice he had it in the shop 5 times for this problem.

Whenever it is wet outside I lose my guages and elogs send a message that ecm connection has been lost and then a second or two that connection has been reestablished. I thought of changing engine wiring harnness until I found out that it is 2200.00 This problem is driving me crazy. Also I get tons of messages datalink, climate unit datalink, engine ecm, light control module, vehicle ecu. This last message starts coming before I lose my guages

Answer this question I have this problem too

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Clean ALL electrical connections you can find (ie. bulkhead plugs, ground-to-frame, alternator leads, ECM plug). There is a code troubleshooting guide for DDEC engines ( http://www.dmbruss.com/images/Schematics... ). Maybe you can find one for your engine. This is how me and Valley Power in San Diego solved my similar problem. Wiring issues can get REAL expensive in the labor charges. I was considering a new harness until we got lucky and found the problem in the bulkhead communications link plug between the ECM and the cab. Good luck to you.

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I would seriously have that engine wiring harness changed, and also have the ECU and Body Control Module (Gauge Cluster) inspected. It might be $2200, but given you are losing your e-logs, gauges and other critical instruments, you might need to do it anyway. If you can't change it, go to Blue Beacon and get an engine wash. Then once the wash is complete, check EVERY connection under the hood and make sure it's clean and free of corrosion.

Chances are this is a wire that has corroded so much that it has shorted out, hence the suggestion of replacing the harness. Electrical problems are very time-consuming to troubleshoot, and road salt is a common cause. A loose ignition key switch wire can mimic the symptoms with the e-logs and gauges as well, but I have a very good reason to suspect the wiring under the hood.

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To Mr. Queen,

Thanks for DDEC manual but there are no schematics in there only a table of contents!

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I would replace the whole wiring harness!

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had this happen on several volvos I had, each time the instrument cluster had to be replaced, but I would start with engine cleaning, checking wires for shorts and get dielectric grease at napa ($5) and put it in all the connections and keep it in your truck, its good to have. On a 2003 truck things have been rubbing for 10 years you will get more of these problems. and if you cant fix it just drive the truck into a lake and get another one :)

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My brothers Volvo had a similar problem. The wiring harness that goes around the back of the engine had rubbed on the bell housing. He respliced all the bad wires and fixed all his problems.

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http://www.youtube.com/watch?v=5QkOS_znh...

check this out just found this on youtube, never heard of this company so not sure if what they promise is any good or not but for $250 it may be better alternative then buying a whole instrument cluster (if that is your problem).

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I lost all my gauges on my 99 volvo and just replaced the ignition module that is directly connected to your key connection. Fixed. Never had a problem again. Cheap easy fix.

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Had the same problem on an 04. the A/C and instruments would go blank after startup, then sometimes they'd come back up and sometimes not. I changed the keyswitch and it fixed it.

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I have this problem with a 2003 VOLVO VNL with N14 CUMMINS for 3 months spend $3,500 with new cluster, eps sensor, alternator, intake sensor, fuel selenoid, check valve clean out, my problem was Gauges stops working and going up and down like crazy, cluth fan ABS, TCS LIGHTS ON, TEMPERATURE GAUGE GOING UP ALL THR WAY, MID 128 (MEANS ENGINE NOT RESPONDING) J1708 CODE, CHECK INFO NEXT STOP, CHECK ENGINE, AND MANY OTHER CODES, my problem was solve for an excellent truck electrician in Chicago the problem was the Dash Control Module Part LOCATED ON THE REAR CHASSIS OF THE TRUCK UNDER THE CAT WALK A BLACK MODULE WAS BRITTLE AND DAMAGE BY THE SALT ON THE REAR SIDE ATTACHED TO THE CHASSIS CHANGE, RESET CODES AND THE TRACTOR WORKS LIKE NEW. SPEND ONLY $650 labor and used part. VOLVO WITH CUMMINS THE MODULE IS IN THE REAR CHASSIS UNDER THE CAT WALK.

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budkatzmarek will be eternally grateful.
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