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Discussion Starter · #1 ·
i own a 99 beetle and the other day I was driving and a brake light came coming on on the dashboard. after a few minutes the car quit running. I was able to pull into a gas station. after observation under the hood I noticed that the fuse box on top of the battery was burnt. I replace it and the wire harness going to the alternator including the replacement of the alternator. NOW THIS CAR WILL NOT START!!!!:confused: I checked all the fuses at the bottom of the driver side dash and the one on the side of the dash. I noticed that the ignition coil is not working aand I replace it. Still no spark coming out of the coil.
 

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Any trouble codes? You might try doing testing steps for the ignition; check out the service manuals for info here:

http://workshop-manuals.com/volkswagen/

Define won't start:
1. Does the starter motor turn over?
2. The basics:
A. No spark? Start testing the ignition system, note: speed/crank sensors are known to fail.
B. Getting fuel pressure and fuel pump coming on?

Scan the car, for trouble codes and that may point you in the right direction for further troubleshooting and testing. Check out a cheap Vw scanner on Amazon the Vgate vs450 for $50; buy one, you won't regret it! Get those codes and post them up here!




Sent from AutoGuide.com Free App
 

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Discussion Starter · #3 · (Edited)
The engine will turn over but no start. I can hear the fuel being delivered to the injectors the psi is at 43. I have a crank signal. NO TROUBLE CODES
 

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Discussion Starter · #5 ·
im using a modis. There is no spark coming out of the coil.
can this be an indication of a ECM going bad on me?
 

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Please don't take this the wrong way but... check your fuses! I I was working on a 03' Jetta with a 2.0L the other day; I was STUMPED with a NO SPARK condition (after working on the ignition system; wiring grounds under the battery), all things pointed to a bad ecm BUT it turned out to be a fuse! Check the fuse box; on the inside by the left hand side of the dash, behind the little door. I can't remember; which fuse # but check it out and report back... :)

PS: I don't think; even the mighty Snap On Modis; will give you VW factory codes and full scans of all the computers pm these cars or go into coding, matching, throttle body alignment, key matching, and a zillion other VW specific procedures you can do on these crazy marvel of German engineering! If you are at that high end level of tool scanner (Snapon Modis), I recommend you check out the Ross Tech VCDS system; only $350 and you get FREE updates for LIFE/EVER! An amazing deal; if you are used to using and buying updates through Snapon! The USB HEX PLUS CAN; VCDS cable/software, will scan all VW's up to 2015 and beyond... an amazing tool and incredible value, for a factory level scan tool (basically a clone of VW 1552 scan tool system).

http://www.ross-tech.com/vag-com/

http://store.ross-tech.com/shop/cat/VCDS.html

http://store.ross-tech.com/shop/VCHUC.html
 

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Discussion Starter · #7 ·
so far I have checked all the fuses on the box that's located on top of the battery ( the one that was burnt) the fuse box that is on the side of the dashboard drivers side and the two fuses that are located by the relay at the bottom. all the fuses are good on those boxes. Am I missing a box?
 

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The fuse; that was burned out on me, was inside on the left/drivers side, behind the small dash/door. :cool:

Here are some links; to the manual and pages, for fuses, testing of ecm etc.; that should be helpful in your troubleshooting process:

relays:
http://workshop-manuals.com/volkswa...m_horn_relay/component_information/locations/


ecm testing:
http://workshop-manuals.com/volkswa...n/ecm_voltage_supply_open_circuit_correcting/

http://workshop-manuals.com/volkswa...esting_and_inspection/with_generic_scan_tool/

ignition system
http://workshop-manuals.com/volkswa...g_order/component_information/specifications/
 

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Hey, I don't know what else to tell you; the manuals are there for you to research. In my situation; I figured it was the ecm, sent it off to a repair tech that offered ecm repair on ebay.... got it back and installed it, same result... NO SPARK. Frustrated, we looked at the fuses and found a one that was bad; swapped it out and the car started! So, what came first chicken or the egg? Was the ecu fried or was it just the fuse or both? I honestly, don't know but it may case, we got the car running and out of the shop. So, I guess; I would check as much troubleshooting and testing you can find in the manuals and if you don't get anywhere; you could ship the ecu out for repair, thats what I did and the end result, was we got the car running. Did I feel kinda DUMB; when we found the burned out fuse... YES but I can't say definitely, it wasn't the ecm that was the problem..... either! :cool: So, if you feel; like you have done your due diligence; in troubleshooting the problem, sending out the ecu for repair, is definitely a viable step in your repair process! YMMV, caveat emptor and all that baloney! :) What do you think; is the problem? :confused:
 

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Discussion Starter · #13 ·
I Finally was able to get to the bottom of this problem.......
THe alternator regulator went bad and it was putting out 16+V so it burned the fuse box at the battery, also it shorted the ignition coil and finally it roasted the ECM. After a couple of days im back to this love hate relationship with my bug:D
 
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