2003 focus, ztec. PCM draw

Asked by Jul 01, 2013 at 10:23 PM about the 2003 Ford Focus ZX5

Question type: Maintenance & Repair

2003 focus, ztec. new alt. new batt. parasitic draw when the pcm fuse in place. draw goes away when the fuse is removed. tried 'soaking', unplugged all relays and fuses, draw still there. removed gem module, draw still there. nothing aftermarket on the car.  help?

4 Answers

...well let's look at what the PCM is connected to---will have to pull up an electrical diagram~

2 out of 2 people think this is helpful.
58,945

All PCMs, BCMs, EBCMs draw power from the battery all of the time. Even when you turn off the ignition. But, if you frequently use the car and it's killing the battery. Then you've got a problem. On the other hand, if the car sits for extended periods, say more than 2 weeks. A dead battery can be expected. Disconnect the negative (-) battery cable when you plan on not using it. HTH. -Jim

all I could get into was functional 'block' diagrams which will tell us nothing~

if you could bother to get the diagnostics....invest twenty or so bucks to find out what the computer thinks is happening here~

Your Answer

Add photo

Related Questions

Focus

Looking for a Used Focus in your area?

CarGurus has 58,285 nationwide Focus listings starting at $800.

ZIP:

Search Ford Focus Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Focus Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,250
#2 dandyoun
dandyoun
Reputation 880
#3 Su'ad Barakat
Su'ad Barakat
Reputation 840
View All

Related Models For Sale

Used Honda Civic
817 Great Deals out of 69,489 listings starting at $1,200
Used Ford Fiesta
207 Great Deals out of 17,198 listings starting at $2,995
Used Ford Mustang
549 Great Deals out of 42,544 listings starting at $1,699
Used Toyota Corolla
988 Great Deals out of 66,031 listings starting at $1,595
Used Ford Escape
1,333 Great Deals out of 85,408 listings starting at $1,600
Used Mazda MAZDA3
368 Great Deals out of 28,358 listings starting at $1,200
Used Honda Accord
992 Great Deals out of 74,858 listings starting at $899
Used Toyota Camry
1,183 Great Deals out of 95,109 listings starting at $1,250
Used Hyundai Elantra
661 Great Deals out of 51,956 listings starting at $895
Used Nissan Altima
1,046 Great Deals out of 82,893 listings starting at $670
Used Volkswagen GTI
122 Great Deals out of 6,234 listings starting at $1,499
Used Chevrolet Malibu
1,120 Great Deals out of 82,073 listings starting at $1,800

Used Cars For Sale

2017 Ford Focus For Sale
13,711 listings starting at $12,995
2016 Ford Focus For Sale
61 Great Deals out of 16,977 listings starting at $8,900
2015 Ford Focus For Sale
168 Great Deals out of 5,313 listings starting at $7,945
2014 Ford Focus For Sale
302 Great Deals out of 7,213 listings starting at $5,995
2013 Ford Focus For Sale
144 Great Deals out of 3,746 listings starting at $5,177