electrical problem with the ecm detriot series 60

hi,I have a problem with my temp gauge,when the wires or it could be where the harness plugs into my ecm,when it gets wett,say its raining,or even when ive had my engine washed,my temp gauge will go to 250 and the warning lights will come,then the gauge will go back the other way say to 130,and the warning lights will go out,my engine is not hot tho,I thot about unplugging the plugs at the ecm and cleaning the connection,anyone ever have had this problem,and if so anyone got any advice on how I should try to fix this problem,i would like to fix it myself if I can,im an o/o and hate to pay a shop 100 an hr,if theres away that I can get to the bottom of this,any replies would be appreciated,thanks rick

 

thanks for replying,its not the temp sensor,my truck is 2002 Detroit,grape ape your reply is in line with my issue,but would those ecm connectors when they get wet,cause this to happen,thanks rick

 

ok thanks for your reply,i have a good idea where its at,at the fuel island in florida I hosed down the engine just by the ecm,and my gauge started going crazy,so I no its the wires coming out of the ecm,I will pull the wire cover and check today,when I find the problem I will repost,thanks again.rick

 

thanks #######

 

is that how you usually reply to threads,if I were the administrator id kick you out of here,my heat gauge issue has nothing to do with an electrical fire,stay in Canada where you belong,us us drivers don't want youns here anyways,thanks for the reply