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Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Cadillac
Satisfied Customers: 15121
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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I have a 98 caddie deville with a B2750 no start and I have.

Customer Question

I have a 98 caddie deville with a B2750 no start and I have. Bypassed the pass key with resistors i have double checked the values and they are the same but still the problem persists any help?
Submitted: 11 months ago.
Category: Cadillac
Expert:  Tim Mohr replied 11 months ago.

Hi, y name is***** you checked the PCM ignition fuse?

Customer: replied 11 months ago.
Actually no I haven't. The car had about 12 different codes and I had to replace the battery and now just that code is all that pops up. I'll go check the bcm fuse and get right back to ya
Expert:  Tim Mohr replied 11 months ago.

its the PCM fuse we need to check,Tim

Customer: replied 11 months ago.
Is that under the hood or in car?
Expert:  Tim Mohr replied 11 months ago.

it is under the hood, it is labeled PCM IGN

Customer: replied 11 months ago.
All fuses are good
Expert:  Tim Mohr replied 11 months ago.

does that fuse have power, with the key 0n?

Customer: replied 11 months ago.
Expert:  Tim Mohr replied 11 months ago.

ok, can you remove both battery cables, and touch them together for 30 seconds, then reconnect them and see if it will start?

Customer: replied 11 months ago.
I'll be right back
Customer: replied 11 months ago.
I did that and it started or at least acted like it would but went right back to not
Customer: replied 11 months ago.
Will it cost 18 total or plus the 28 for a call?
Expert:  Tim Mohr replied 11 months ago.

phone calls are extra, by just answer, I just answr questions, I dont have anything to do with pricing,Tim

Expert:  Tim Mohr replied 11 months ago.

if it started and died, then its not seeing the proper resistance of the resistor yu installed, or the BCM is bad, what resistance resistor did you use?

Customer: replied 11 months ago.
Ok then I'll just text if you're ok with it
Customer: replied 11 months ago.
I had v meter on x100 and it was 2.5
Expert:  Tim Mohr replied 11 months ago.

did you have it on volts or ohms?

Customer: replied 11 months ago.
but it was actually.25 ohms
Customer: replied 11 months ago.
It was on ohms on the x100 scale
Expert:  Tim Mohr replied 11 months ago.

that would be 2500 ohms, not .25 ohms

there are only 15 different ohm keys for this year, below are the ohms, there is not a .25 ohm chip,Tim

CODE

RESISTOR VALUE IN OHMS

1

402

2

523

3

681

4

887

5

1130

6

1470

7

1870

8

2370

9

3010

10

3740

11

4750

12

6040

13

7500

14

9530

15

11800

Customer: replied 11 months ago.
I'll check it again but I got the exact same reading on the x100 scale with the key and the resistors. I'll get back with you tomorrow if that's ok
Expert:  Tim Mohr replied 11 months ago.

yes, that will be fine I will be on all day tommorow, put the ohm meter on 5000 scale to check this.Tim

Expert:  Tim Mohr replied 11 months ago.

Hi, did you check the resistance yet?

Customer: replied 11 months ago.
I just got back with various resistors I'm going to borrow a digital volt meter because mine is analog . it may take a little time for me to get it so I'll get back on here when I have it in my hand.
Expert:  Tim Mohr replied 11 months ago.

yes, the anolog meters are not accurate enough, let me know when you has a digital meter,Tim

Customer: replied 11 months ago.
Ok my neighbor has one and it reads 886 so I matched resistance at 887 and still the same but with new codes B1147 B2780 B1348. What buttons do I need to push to clear out these codes with the dash buttons?
Expert:  Tim Mohr replied 11 months ago.

ok, lets try a hard reset and relearn od the key now, leave the 887 resistorminstlled for this, then turn the key on, and try to start, and let th keycome back to the run position, then watch the theft deterent message, after about 10 minutes, the message should change, when it does, turn the key off, then repeat the whole procedure 2 more times, this is the 30 minute relearn, aftr the 3rd try, try to start the car,Tim

Customer: replied 11 months ago.
Ok I'll get back to ya...oh hey after off and warmer code check what buttons clear the codes
Expert:  Tim Mohr replied 11 months ago.

once in the code mode, it will show codes, then after it will say"PCM? when it does, push the up button to scroll through all the different module, when you get to the ones with codes, press the up button again when it ask if you want to clear codes,Tim

Customer: replied 11 months ago.
It just says theft system problem car may not restart
Expert:  Tim Mohr replied 11 months ago.

did you clear the codes?

Customer: replied 11 months ago.
but I can't get it to say wait ten minutes to start
Customer: replied 11 months ago.
What do I do to get the 10 min timer?
Expert:  Tim Mohr replied 11 months ago.

WHERE DID YOU HOOK UP THE RESISTOR?

Customer: replied 11 months ago.
Under steering column orange wire with two white wires....but I just sent it to the dealership
Expert:  Tim Mohr replied 11 months ago.

ok, I will opt out then,Tim

Customer: replied 11 months ago.
Thanks though
Expert:  Tim Mohr replied 11 months ago.

no worries,Tim