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Technical Info: 3rd Generation: DRIVETRAIN Technical discussion of third generation (2003 - 2007) engine and drivetrain questions, solutions and upgrades.
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Old 11-22-2017
USMC64-70 USMC64-70 is offline
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Default Wait to start light 2004.5

My wait to start dash light comes on then flashes a few time then goes back to a solid light each time I start the engine. The light stays on. Once engine starts the light goes off. Any ideas on what may be causing this ?
2004.5 3500 SRW 4x2 quad cab, 48RE, long bed, 4.10's, Prodigy, pull a Nash 30 ft 5th wheel.
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Old 11-23-2017
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CaptainCummins CaptainCummins is offline
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Do the dome lights dim when the wait to start light comes on, does the volt meter drop like the grid heater is actually drawing current?

Relay (Or relays) could be failing. Not sure where they are on an 04, but they are traditionally mounted to the battery tray. Checked to see if there is battery power getting to them, then have some one turn the key on and see if there is power going out to the grid heater. A test light is all you need.
2012 F-150 Twin Turbo V-6
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Old 11-23-2017
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lupusludwick lupusludwick is offline
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The relays are in the battery tray (engine compartment fuse box) on the drivers side.
End over end down a canyon.. truck is FUBAR: 2004.5 2500 HO 600 4X2 SLT QC LWB 48RE / 11.5 4.10 Limited Slip / ROKK sensor / FASS 95gph / Boost Fooler / Issapro Gauges / Rebuilt Engine with many mods including ARP studs / Trans rebuilt performace parts including builet shafts.

2018 3500 Laramie Crew Cab 4X4 Long Box / Bone stock for now.

98 2500 4X4 Reg Cab / 5 Speed / Bone stock
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