speedometerbroke?
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Registered User
Joined: Apr 2005
Posts: 39
speedometerbroke?
hey guys watsappp im panicking cause i jsut encountered a problem. I have a 92 240sx coupe with a digital speedometer. My battery just died so i replaced it with a new one. Now i didnt drive my car for about a week or so and i tried my car today and the speedometer doesnt dispaly anything, but everything else works rpms, fuel, clock they all light up except the digital speedometer. Now whats weird is when i start the car it turns on and after a few seconds/minutes it will jsut dim out and wont come back till i shut off and turn back the car. Now i dont have my license yet and my appointment is monday, i neeed my car for this to pass lol Could it be a battery defect? is it a short, ahh i rly dont know what it is mechanics dunt want to touch it so im up a wall right now so i came to you guys, please peeps help me 
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Joined: Feb 2005
Posts: 227
From: NJ
Re: speedometerbroke?
Originally posted by my92nx2kt@240sxforums.com
Ok i just baught a 93 240 and it had the infamous dash lights hud and speedo inop untill the car reached the right temp. so i figured that the cluster was bad and had to get another one why not take this one apart. so i took the dash apart droping the steering column and removed the cluster. next dissambled it and removed the digital speedo part. than pluged in just the digital speedo part. than got a heat gun and started to heat each capacitor. than i found it it took a littel bit. i cooled it and heated it a couple of times to make sure. you can see it in the picture the one with the ring in it looks like a can. now it get a little tricky you have to take the 3 layers of circuit boards apart a couple of screws and 2 plastic clips and it comes apart. once it is a part pull the capacitor off of the board with pliers. there should be 2 legs sticking out of the board. next get the 1mf 50v capacitor you got from your local eletronics store and a good soldering iron put a bead of solder on each of the legs on the circuit board. than put the capacitor legs on the one sticking out of the board and hit each leg quickly so they solder together. than put all the boards back together and try it it now works if done right. For extra reinsurance i put hot glue on the capacitor and its legs so it could not vibrate loose. All is good now and it was fixed for less than $5
Ok i just baught a 93 240 and it had the infamous dash lights hud and speedo inop untill the car reached the right temp. so i figured that the cluster was bad and had to get another one why not take this one apart. so i took the dash apart droping the steering column and removed the cluster. next dissambled it and removed the digital speedo part. than pluged in just the digital speedo part. than got a heat gun and started to heat each capacitor. than i found it it took a littel bit. i cooled it and heated it a couple of times to make sure. you can see it in the picture the one with the ring in it looks like a can. now it get a little tricky you have to take the 3 layers of circuit boards apart a couple of screws and 2 plastic clips and it comes apart. once it is a part pull the capacitor off of the board with pliers. there should be 2 legs sticking out of the board. next get the 1mf 50v capacitor you got from your local eletronics store and a good soldering iron put a bead of solder on each of the legs on the circuit board. than put the capacitor legs on the one sticking out of the board and hit each leg quickly so they solder together. than put all the boards back together and try it it now works if done right. For extra reinsurance i put hot glue on the capacitor and its legs so it could not vibrate loose. All is good now and it was fixed for less than $5
there are pictures.
Thread Starter
Registered User
Joined: Apr 2005
Posts: 39
anyone know how much itll cost me for a digital speedo 1992, my dads an electrician he fix all the diods and cold solders and resistors and still nothing , how much would it cost for a digi speedo cause if its not the rpob i cant return the thing