No Lights, Heater or Radio. Run's perfectly - Infamous Nissan

Arrio · 12-30-2022, 06:26 AM

My truck is repeatedly blowing the Engine Control fuse after I accidentally plugged in a new battery the wrong way. It runs great but the turn signals, break lights, radio or heater don't work whatsoever. Were certain it has a short somewhere but I have no clue where. if anyone could give me any tips or possible ideas it would be much appreciated!

alabama_lowlife · 12-30-2022, 01:06 PM

Check the fusible links at the battery for the lights, etc not working. The engine control fuse blowing may mean the ECM got fried.

89'HBV6 · 12-30-2022, 05:20 PM

Welcome to IN...

Yea, what Alabama said! You can DL the FSM at the link in my sig. GL...

Arrio · 12-31-2022, 12:17 AM

No check engine light on, runs like a top. Lights the only real issue other than the fuse blowing.

PorknBeans · 12-31-2022, 01:55 AM

Go to the “EL” section of the Factory Service Manual(FSM) and check the circuits from point to point using a meter and continuity tests between each connection point.

You could also pull the passenger seat and open the top cover of the ECM & visually inspect(without touching the circuit boards) the boards and look for any burned spots(black).

Deerhurst · 12-31-2022, 04:05 AM

CEL is only for emissions on the D21. Pull codes from the ECM to see if it thinks anything is actually wrong.

Arrio · 01-03-2023, 01:12 AM

ECM is not burnt or damaged anywhere, fusable links seem fine.

PorknBeans · 01-03-2023, 05:39 AM

Quote:

Originally Posted by Arrio

My truck is repeatedly blowing the Engine Control fuse after I accidentally plugged in a new battery the wrong way. It runs great but the turn signals, break lights, radio or heater don't work whatsoever. Were certain it has a short somewhere but I have no clue where. if anyone could give me any tips or possible ideas it would be much appreciated!

Have you checked the EL Section of the service manual and test the circuits that are not working?

If the truck runs great..then, great! Check the circuits in question.

Something is loading the circuit down and causing overloading and popping the fuse. Unplug the lights on at a time and power up with the key on and see if if the fuse blows. If not, try another component unplugged to see if the fuse blows again. Rinse. Repeat.

If when the fuse doesn’t pop with a component unplugged. You’ve found the culprit.

‘97 Hardbody Electrical Schematic:

89'HBV6 · 01-03-2023, 08:53 PM

Quote:

Originally Posted by Arrio

ECM is not burnt or damaged anywhere, fusable links seem fine.

Seem? Ummmm, that's not how you test a fusible link.

Please check the FSM for the proper procedure.

Arrio · 01-18-2023, 05:16 AM

it was the Fusible links. thanks for everyones help. just picked up a 83 toyota hilux from an old man, clean 1 owner

12-30-2022, 06:26 AM	#1
Arrio Join Date: Dec 2022 Location: United States Posts: 4 Vehicle: 1997 Nissan Hardbody 2wd Thanks: 1 Thanked 1 Time in 1 Post	No Lights, Heater or Radio. Run's perfectly My truck is repeatedly blowing the Engine Control fuse after I accidentally plugged in a new battery the wrong way. It runs great but the turn signals, break lights, radio or heater don't work whatsoever. Were certain it has a short somewhere but I have no clue where. if anyone could give me any tips or possible ideas it would be much appreciated!

12-30-2022, 01:06 PM	#2
alabama_lowlife Owner and Administrator Join Date: Sep 2008 Location: New Brockton, Alabama Age: 43 Posts: 11,023 Vehicle: 2012 370Z, 1970 Datsun 521, 1995 Nissan Hardbody x2, 1994 Hardbody Thanks: 1,160 Thanked 2,326 Times in 1,913 Posts	Check the fusible links at the battery for the lights, etc not working. The engine control fuse blowing may mean the ECM got fried. __________________

12-31-2022, 01:55 AM	#5
PorknBeans Join Date: Dec 2019 Location: Where I can see the air I breathe... Posts: 1,094 Vehicle: 1997 XE King Cab with 3 pedals, KA24E & 2WD, Y’all Thanks: 109 Thanked 343 Times in 280 Posts	Go to the “EL” section of the Factory Service Manual(FSM) and check the circuits from point to point using a meter and continuity tests between each connection point. You could also pull the passenger seat and open the top cover of the ECM & visually inspect(without touching the circuit boards) the boards and look for any burned spots(black). __________________

12-31-2022, 04:05 AM	#6
Deerhurst 4/86 SE-V6 2 tone 4x4 HB Join Date: Apr 2013 Location: Oregon Posts: 8,336 Vehicle: 1986.5 SE-V6 4WD D21, 2003 Audi A4 Avant 3.0 Quattro Thanks: 929 Thanked 1,180 Times in 1,064 Posts	CEL is only for emissions on the D21. Pull codes from the ECM to see if it thinks anything is actually wrong. __________________ 1986.5 SE-V6 4X4 D21 Hardbody Pacesetter Long Tube Headers Morimoto Mini D2S HID Projectors and Hella 500s VG33i

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12-31-2022, 12:17 AM	#4
Arrio Join Date: Dec 2022 Location: United States Posts: 4 Vehicle: 1997 Nissan Hardbody 2wd Thanks: 1 Thanked 1 Time in 1 Post	No check engine light on, runs like a top. Lights the only real issue other than the fuse blowing.

01-03-2023, 01:12 AM	#7
Arrio Join Date: Dec 2022 Location: United States Posts: 4 Vehicle: 1997 Nissan Hardbody 2wd Thanks: 1 Thanked 1 Time in 1 Post	ECM is not burnt or damaged anywhere, fusable links seem fine.

01-18-2023, 05:16 AM	#10
Arrio Join Date: Dec 2022 Location: United States Posts: 4 Vehicle: 1997 Nissan Hardbody 2wd Thanks: 1 Thanked 1 Time in 1 Post	it was the Fusible links. thanks for everyones help. just picked up a 83 toyota hilux from an old man, clean 1 owner