Help, PCM relay clickng nothing else
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Junior Member
Joined: Jul 2002
Posts: 9
Likes: 0
From: Honolulu, HI
Help, PCM relay clickng nothing else
please help me if you can
2k f150 spcab 2x4 , 5.4L auto 61k miles
went to start my truck to night , it turned over and died
no lights nothing works but the light under the hood , thought it was battery put a tester on it and got 12 v get back in and I can hear clicking from fuse box long story short the PCM relay in the dash fuse box is clicking and the light under the hood flashing along with it
this is were it gets wierd when the door is shut it stops
what is wrong with my truck? and can I fixit or does it need a visit to the wrench shop?
thanks all Roy @ Pearl Harbour
2k f150 spcab 2x4 , 5.4L auto 61k miles
went to start my truck to night , it turned over and died
no lights nothing works but the light under the hood , thought it was battery put a tester on it and got 12 v get back in and I can hear clicking from fuse box long story short the PCM relay in the dash fuse box is clicking and the light under the hood flashing along with it
this is were it gets wierd when the door is shut it stops
what is wrong with my truck? and can I fixit or does it need a visit to the wrench shop?
thanks all Roy @ Pearl Harbour
Senior Member
Joined: Jul 2002
Posts: 485
Likes: 0
From: Central Florida
No fun being on Gilligan's Island in a dead truck.
Looks like you may need a new battery. I knew I'd read a similar post before, and here it is.
No Start, Clicking Relay
Looks like you may need a new battery. I knew I'd read a similar post before, and here it is.
No Start, Clicking Relay
Member
Joined: Feb 2003
Posts: 12
Likes: 0
just had similar problem myself on my '98. Tried to start - pop -then nothing. Relays clicking, no gauge movement when key in run. 13.7 volts at battery and at chassis.
Swapped relays around where possible. After swapping a couple of them under the hood I got my gauges back. At that point (couple days later) the voltage was down to 9 so put in new one and it now starts fine.
The bad news. Now my ABS, airbag and check engine lights are on. No cruise control and missed badly. And I'm not sure power accessories are shutting off when key goes to start position. My XM radio no longer shuts of like it used to when starting. Trying to get truck to shop today to get checked.
Be careful if you swap the relays around. Do it with the battery disconnected. I did it live and that may be what caused my problem - I think I may have affected the brain.
Hope that helps.
Swapped relays around where possible. After swapping a couple of them under the hood I got my gauges back. At that point (couple days later) the voltage was down to 9 so put in new one and it now starts fine.
The bad news. Now my ABS, airbag and check engine lights are on. No cruise control and missed badly. And I'm not sure power accessories are shutting off when key goes to start position. My XM radio no longer shuts of like it used to when starting. Trying to get truck to shop today to get checked.
Be careful if you swap the relays around. Do it with the battery disconnected. I did it live and that may be what caused my problem - I think I may have affected the brain.
Hope that helps.
Technical Article Contributor
Joined: Dec 1997
Posts: 9,417
Likes: 11
From: Windsor,Ontario,Canada
Roy,
Try the main ground from the Battery. If it is corroded/lose it will cause the clicking. It is the GEM module and the grounds have to be perfect. Then pull the kick panel on the driver side and check the ground wires. They have green bolts.
Regards
Jean Marc Chartier
Try the main ground from the Battery. If it is corroded/lose it will cause the clicking. It is the GEM module and the grounds have to be perfect. Then pull the kick panel on the driver side and check the ground wires. They have green bolts.
Regards
Jean Marc Chartier
