Question about Volkswagen Jetta
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Posted on Jan 02, 2017
SOURCE: half my fuse box went out
On the buss connector for the turn signal switch with the signal flashing check voltage on the Green-W/trace. Should be intermittent 13.8 V.
1) The Orange at the signal selector buss should have +13.8v all time key is on.
2) Check red w/trace at brake lamp switch, With brake pressed both sides should have +13.8v
(if there is no voltage at above ORANGE we need to check the fuseclips for corrosion, then pull the fuseblock out and check for corrosion on the wires. The buss that feeds those fuses could have some corrosion going on.)
If the turn signal switch fails it will take out the brake lights also, IMHO this will be found to be the culprit in most failures. Gotten allot of water around under the dash?
Posted on May 19, 2009
it is normal for most of your fuses to have no power with the key off. when the key is turned on the ignition switch powers up relays that provide power to the other fuses. some vehicles are set up so that the brake lights will not illuminate unless the key is on or car is running.
Posted on Mar 23, 2010
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