C5 2000 will not crank
Thread Starter
7th Gear
Joined: Jul 2025
Posts: 7
Likes: 0
C5 2000 will not crank
My 2000 c5 automatic will not crank.does not turn over,only thing is dash lights come on.its sending codes
p1626
B0026
B0029
U1000
U1160
U1176
Came home and went to leave and no crank,went 2 days trying to read about why and finally had friend come over with a scanning tool and he got in car and it cranked like nothing ever wrong,so I went riding turning car off several times but cranked every time ,then I go to store later that night and come out of store no crank,finally got it home and it's been 9 days now no crank I took ignition switch out tested ohms and failed so got new one no crank and my radio and windows do not work.i tried jumping with a wire to the purple and red wire it fired right up only for a second the cut off,im no mechanic but know a good bit about cars I've tried everything I know how to do so please please someone help I can't start just buying parts out of the blue .im so discouraged at this point being it's my daily driver and 9 days stranded is killing me '
p1626
B0026
B0029
U1000
U1160
U1176
Came home and went to leave and no crank,went 2 days trying to read about why and finally had friend come over with a scanning tool and he got in car and it cranked like nothing ever wrong,so I went riding turning car off several times but cranked every time ,then I go to store later that night and come out of store no crank,finally got it home and it's been 9 days now no crank I took ignition switch out tested ohms and failed so got new one no crank and my radio and windows do not work.i tried jumping with a wire to the purple and red wire it fired right up only for a second the cut off,im no mechanic but know a good bit about cars I've tried everything I know how to do so please please someone help I can't start just buying parts out of the blue .im so discouraged at this point being it's my daily driver and 9 days stranded is killing me '
Melting Slicks
Joined: Sep 2008
Posts: 3,132
Likes: 799
From: Espanola New Mexico
You still might have a bad Ignition switch as new ones are Made In China, and are bad right out of the box. Hoping @c5diag sees this reply, he knows what wires coming out of the Ignition switch should have power when you try to start the car. Can you hear the TDR click on when you turn the key to start?
Last edited by mmartinez; Jul 20, 2025 at 05:28 PM.
Melting Slicks
Joined: Sep 2008
Posts: 3,132
Likes: 799
From: Espanola New Mexico
If the click happens when you turn the key to start/crank that is the TDR, and since you can get the car to crank by jumpering the red and violet that tells me the contacts inside the TDR are not sending power to the starter solenoid, and you should replace the TDR.
Melting Slicks
Joined: Sep 2008
Posts: 3,132
Likes: 799
From: Espanola New Mexico
The start voltage originates from the Ignition switch, makes its way to the Park/ Neutral safety switch, and then to the TDR. The yellow wire at the TDR is 12v, the yellow black stripped wire is a ground provided by the BCM. You have to find out what is not present at the TDR, the 12v or ground. You can try disconnecting the negative battery terminal and touching it to the positive battery cable after disconnecting it from the battery this sometimes works if the BCM is at fault.
Last edited by mmartinez; Jul 21, 2025 at 11:08 PM.
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