2002 F150 4.6L V8 pulsing lights HELP
#1
2002 F150 4.6L V8 pulsing lights HELP
Hey everyone,
so I have a 2002 F150 4.6L Triton V8 rwd.
i have a new battery and a new alternator
my headlights, dash lights, and dome lights pulse all the time when on. DRL pulse as well. They seem to pulse at the same rate as the engine.
The only code that i have pulled with an OBD2 is a vacuum issue in the gas tank.
any ideas what could be causing this issue? Thought the new alternator/regulator and battery would have fixed the issue but nop.
battery charges fine. No issues with starting.
pulsing only happens while engine is running.
Thank you.
so I have a 2002 F150 4.6L Triton V8 rwd.
i have a new battery and a new alternator
my headlights, dash lights, and dome lights pulse all the time when on. DRL pulse as well. They seem to pulse at the same rate as the engine.
The only code that i have pulled with an OBD2 is a vacuum issue in the gas tank.
any ideas what could be causing this issue? Thought the new alternator/regulator and battery would have fixed the issue but nop.
battery charges fine. No issues with starting.
pulsing only happens while engine is running.
Thank you.
#2
Senior Member
Check all your grounds
#4
Senior Member
Need to make use of MM the system. Yea you really can't look at ground and presume it fine. You mentioned a new alternator, so did you clean the alt mounting surfaces. Absolute ground is the alt case which transfers to the mount location on the engine. What's you alternator doing during the surge, I'd start there with an MM and do some tracking, find the surge. Since everything's surging, should have the ability locate a bad connection within the main cabling.
Last edited by Jbrew; 11-01-2018 at 07:45 PM.
#5
Hey everyone,
so I have a 2002 F150 4.6L Triton V8 rwd.
i have a new battery and a new alternator
my headlights, dash lights, and dome lights pulse all the time when on. DRL pulse as well. They seem to pulse at the same rate as the engine.
The only code that i have pulled with an OBD2 is a vacuum issue in the gas tank.
any ideas what could be causing this issue? Thought the new alternator/regulator and battery would have fixed the issue but nop.
battery charges fine. No issues with starting.
pulsing only happens while engine is running.
Thank you.
so I have a 2002 F150 4.6L Triton V8 rwd.
i have a new battery and a new alternator
my headlights, dash lights, and dome lights pulse all the time when on. DRL pulse as well. They seem to pulse at the same rate as the engine.
The only code that i have pulled with an OBD2 is a vacuum issue in the gas tank.
any ideas what could be causing this issue? Thought the new alternator/regulator and battery would have fixed the issue but nop.
battery charges fine. No issues with starting.
pulsing only happens while engine is running.
Thank you.
Good luck.
#6
Thanks for the idea LWJ, ill check that out today.
ran a ground straight to the alternator this morning to test if the alternator was having a bad ground but nothing.
ill post once i check fuse block.
ran a ground straight to the alternator this morning to test if the alternator was having a bad ground but nothing.
ill post once i check fuse block.
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#10
Senior Member
Originally Posted by LWJ
Both of them? Service Adviser didn't specify.